List of Publications

Acid-base Studies

Angew. Chem. Int. 2018, 57,(9) 2344-2347. The Ideal Ionic Liquid Salt Bridge for the Direct Determination of Gibbs Energies of Transfer of Single Ions, Part I: The Concept

Angew. Chem. Int. 2018, 57,(9) 2348-2352. The Ideal Ionic Liquid Salt Bridge for Direct Determination of Gibbs Energies of Transfer of Single Ions, Part II: Evaluation of the Role of Ion Solvation and Ion Mobilities

Green Chem. 2018, 20,(10) 2392-2394. Comment on “Zemplén transesterification: a name reaction that has misled us for 90 years” by B. Ren, M. Wang, J. Liu, J. Ge, X. Zhang and H. Dong, Green Chemistry, 2015, 17, 1390–1394

Eur. J. Org. Chem. 2018, 2018,(6) 739–749. Enhancement of Push–Pull Properties of Pentafulvene and Pentafulvalene Derivatives by Protonation at Carbon

ACS Omega 2017, 2 (11), 7772–7776. Systematic Optimization of Liquid–Liquid Extraction for Isolation of Unidentified Components

Chem. Sci. 2017, 8, 6964-6973. A unified view to Brønsted acidity scales: do we need solvated protons?

Angew. Chem. Int. 2017, 56, 1411-1415. 1,1,3,3-Tetratriflylpropene (TTP): A Strong, Allylic C–H Acid for Brønsted and Lewis Acid Catalysis

Eur. J. Org. Chem 2017, 4475-4489. On the Basicity of Conjugated Nitrogen Heterocycles in Different Media

Tetrahedron Letters 2017, 58, 2098-2102. Synthesis and Properties of Highly Lipophilic Phosphazene Bases

J. Phys. Chem. A 2017, 121, 357-369. Hydrogen-Bond Donicity in DMSO and Gas Phase and Its Dependence on Brønsted Acidity

J. Org. Chem 2016, 81, 7349-7361. Experimental Basicities of Superbasic Phosphonium Ylides and Phosphazenes

J. Phys. Chem. A 2016, 120, 3663-3669. Acidity of Strong Acids in Water and Dimethyl Sulfoxide

J. Phys. Chem. A 2016, 120, 2591-2604. Experimental Basicities of Phosphazene, Guanidinophosphazene, and Proton Sponge Superbases in the Gas Phase and Solution

Angew. Chem. Int. Ed. 2015, 54, 9262-9265. Basicity Limits of Neutral Organic Superbases

Angew. Chem. Int. Ed. 2015, 137, 6680-6691. Conformational Switching of a Foldamer in a Multicomponent System by pH-Filtered Selection between Competing Noncovalent Interactions

Anal. Chem. 2015, 87, 2623-2630. Unified pH Values of Liquid Chromatography Mobile Phases

J. Phys. Chem. A 2015, 119, 735-743. Superacidity of closo-Dodecaborate-Based Brønsted Acids: a DFT Study

Croat. Chem. Acta 2014, 87, 385-395. Basicities of Strong Bases in Water: A Computational Study

Angew. Chem. Int. Ed. 2014, 53, 1435-1438. Very Strong Organosuperbases Formed by Combining Imidazole and Guanidine Bases: Synthesis, Structure, and Basicity

J. Phys. Org. Chem. 2014, 27, 676-679. Gas-phase acidity of bis[(perfluoroalkyl)sulfonyl]imides. Effects of the perfluoroalkyl group on the acidity

ChemPhysChem 2013, 14, 1909 – 1919. Evaluating the COSMO-RS Method for Modeling Hydrogen Bonding in Solution

Angew. Chem. Int. Ed. 2013, 52, 11569-11572. On the Acidity and Reactivity of Highly Effective Chiral Brønsted Acid Catalysts: Establishment of an Acidity Scale

Chem. Sci. 2013, 4, 2788-2796. Electronic effects of triarylphosphines in metal-free hydrogen activation: a kinetic and computational study

J. Phys. Org. Chem. 2013, 26, 162-170. Acidities of strong neutral Brønsted acids in different media

Chem. Eur. J. 2012, 18, 3621-3630. A New Class of Organosuperbases, N-Alkyl- and N-Aryl-1,3-dialkyl-4,5-dimethylimidazol-2-ylidene Amines: Synthesis, Structure, pKBH+ Measurements, and Properties

Eur. J. Org. Chem 2012, 2012, 2167-2172. Basicity of Phosphanes and Diphosphanes in Acetonitrile

Chem. Eng. J 2011, 171, 794-800. Performance of single-component CO2-binding organic liquids (CO2BOLs) for post combustion CO2 capture

J. Org. Chem. 2011, 76, 391-395. Equilibrium Acidities of Superacids

J. Phys. Chem. A 2010, 114, 10694-10699. Gas-Phase Basicities Around and Below Water Revisited

Angew. Chem. Int. Ed. 2010, 49, 6885-6888. A Unified pH Scale for All Phases

J. Phys. Chem. A 2009, 113, 8421-8424. Revision of the Gas-Phase Acidity Scale below 300 kcal mol−1

J. Comp. Chem. 2009, 30, 799-810. Prediction of acidity in acetonitrile solution with COSMO-RS

J. Org. Chem. 2008, 73, 2607-2620. Pentakis(trifluoromethyl)phenyl, a Sterically Crowded and Electron-withdrawing Group: Synthesis and Acidity of Pentakis(trifluoromethyl)benzene, -toluene, -phenol, and -aniline

Chem. Eur. J. 2007, 13, 7631-7643. Brønsted Basicities of Diamines in the Gas Phase, Acetonitrile, and Tetrahydrofuran

J. Phys. Chem. A 2007, 111, 1245-1250. Experimental Gas-Phase Basicity Scale of Superbasic Phosphazenes

Anal. Chim. Acta 2006, 566, 290-303. Uncertainty estimation in measurement of pKa values in nonaqueous media: A case study on basicity scale in acetonitrile medium

J. Org. Chem. 2006, 71, 2829-2838. A ComprehensiveSelf-Consistent Spectrophotometric Acidity Scale of Neutral Brønsted Acids in Acetonitrile

J. Org. Chem. 2006, 71, 7155-7164. Substituent Effects on the Basicity of 3,7-Diazabicyclo[3.3.1]nonanes

J. Am. Chem. Soc. 2005, 127, 17656-17666. Guanidinophosphazenes: Design, Synthesis, and Basicity in THF and in the Gas Phase

J. Org. Chem. 2005, 70, 1019-1028. Extension of the Self-Consistent Spectrophotometric Basicity Scale in Acetonitrile to a Full Span of 28 pKa Units: Unification of Different Basicity Scales

J. Org. Chem. 2003, 68, 9988-9993. Acid−Base Equilibria in Nonpolar Media. 4. Extension of the Self-Consistent Basicity Scale in THF Medium. Gas-Phase Basicities of Phosphazenes

J. Org. Chem. 2003, 68, 7795-7799. Acid−Base Equilibria in Nonpolar Media. 3. Expanding the Spectrophotometric Acidity Scale in Heptane

J. Chem. Soc. Perkin Trans. 2 2002, 1950-1955. The immense acidifying effect of the supersubstituent [double bond, length as m-dash]NSO2CF3 on the acidity of amides and amidines of benzoic acids in acetonitrile

Inorg. Chim. Acta 2002, 340, 87-96. Sitting-atop complex formation of 2,3,7,8,12,13,17,18-octaethylporphyrin with copper(II) ion in acetonitrile

J. Org. Chem. 2002, 67, 1873-1881. Acid−Base Equilibria in Nonpolar Media. 2.1 Self-Consistent Basicity Scale in THF Solution Ranging from 2-Methoxypyridine to EtP1(pyrr) Phosphazene

J. Chem. Soc. Perkin Trans. 2 2001, 229-232. The enormous acidifying effect of the supersubstituent [double bond, length half m-dash]NSO2CF3 on the acidity of derivatives of benzenesulfonamide and toluene-p-sulfonamide in the gas phase and in dimethyl sulfoxide

J. Org. Chem. 2000, 65, 6202-6208. Self-Consistent Spectrophotometric Basicity Scale in Acetonitrile Covering the Range between Pyridine and DBU

J. Chem. Soc. Perkin Trans. 2 2000, 1125-1133. Comparison of Brønsted acidities of neutral CH acids in gas phase and dimethyl sulfoxide

J. Org. Chem. 1998, 63, 7868-7874. Spectrophotometric Acidity Scale of Strong Neutral Brønsted Acids in Acetonitrile

J. Org. Chem. 1997, 62, 8479-8483. Acid−Base Equilibria in Nonpolar Media. 1. A Spectrophotometric Method for Acidity Measurements in Heptane

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Liquid Chromatography and Mass Spectrometry

ChemistrySelect 2018, 3 (1), 335-338. Modifying the Acidity of Charged Droplets

Anal. Chem. 2017, 89 (21), 11592-11597. Sponge Spray – Reaching New Dimensions of Direct Sampling and Analysis by MS

Int. J. Environ. Anal. Chem. 2017, 97 (8), 695-709. Analysis and validation of perfluorinated compounds in water, sediment and fish with LC-ESI–MS/MS

J. Am. Soc. Mass Spectrom. 2017, 28 (10), 2124–2131. The Evolution of Electrospray Generated Droplets is Not Affected by Ionization Mode

Anal. Chem. 2017, 89 (11), 5665-5668. Think Negative: Finding the Best Electrospray Ionization/MS Mode for Your Analyte

Anal. Bioanal. Chem. 2017, 409, 3145-3151. Signal Enhancement in the HPLC-ESI-MS/MS analysis of spironolactone and its metabolites using HFIP and NH4F as eluent additives

J. Chromatogr. B 2017, 1052, 150-157. A highly sensitive method for the simultaneous UHPLC-MS/MS analysis of clonidine, morphine, midazolam and their metabolites in blood plasma using HFIP as the eluent additive

Int. J. Mass Spectrom. 2017, 421, 189-195. Comparison of amino acid derivatization reagents for liquid chromatography atmospheric pressure chemical ionization mass spectrometric analysis of seven amino acids in tea extract

J. Am. Soc. Mass Spectrom. 2017, 28(5), 461-469. Adduct Formation in ESI/MS by Mobile Phase Additives

Anal. Chem. 2017, 89 (9), 5079–5086. Predicting ESI/MS Signal Change for Anions in Different Solvents

Eur. J. Mass Spectrom. 2017, 23(5), 245-253. Dependence of matrix effect on ionization polarity during LC-ESI-MS analysis of derivatized amino acids in some natural samples

J. Am. Soc. Mass Spectrom. 2017, 28, 461-469. pH Effects on Electrospray Ionization Efficiency

PLoS One 2017, 12(3), 335-338. Strategy of Pseudomonas pseudoalcaligenes C70 for effective degradation of phenol and salicylate

Environ. Sci. Pollut. R. 2017, 24 (9), 7880-7888. Determination of glyphosate in surface water with high organic matter content

Anal. Chim. Acta 2016, 942, 23-39. Tutorial on estimating the limit of detection using LC-MS analysis, part I: Theoretical review

Anal. Chim. Acta 2016, 942, 40-49. Tutorial on estimating the limit of detection using LC-MS analysis, part II: Practical aspects

Anal. Chem. 2016, 88, 3435-3439. Establishing Atmospheric Pressure Chemical Ionization Efficiency Scale

J. Environ. Sci. Health B 2016, 51(7), 455-464 Determination of neonicotinoids in Estonian honey by liquid chromatography–electrospray mass spectrometry

J. Am. Soc. Mass Spectrom. 2016, 27, 1211-1218. Ionization Efficiency of Doubly Charged Ions Formed from Polyprotic Acids in Electrospray Negative Mode

Acta Anaesthesiol. Scand. 2016, 60, 230-240. Pharmacokinetics and pharmacodynamics of piperacillin/tazobactam during high volume haemodiafiltration in patients with septic shock

J. Am. Soc. Mass Spectrom. 2015, 26, 1923-1930. Transferability of the Electrospray Ionization Efficiency Scale between Different Instruments

J. Food Compos. Anal. 2015, 41, 221-225. Paper spray ionization mass spectrometry: Study of a method for fast-screening analysis of pesticides in fruits and vegetables

J. Chromatogr. A 2015, 1390, 62-70. Development of amino acid derivatization reagents for liquid chromatography electrospray ionization mass spectrometric analysis and ionization efficiency measurements

J. Clin. Pharmacol. 2015, 55, 438-446. Pharmacokinetics of doripenem during high volume hemodiafiltration in patients with septic shock

Anal. Chem 2015, 87, 2623-2630. Unified pH Values of Liquid Chromatography Mobile Phases

Anal. Chim. Acta 2015, 870, 29-44. Tutorial review on validation of liquid chromatography–mass spectrometry methods: Part I

Anal. Chim. Acta 2015, 870, 8-28. Tutorial review on validation of liquid chromatography–mass spectrometry methods: Part II

J. Food Comp. Anal. 2015, 41, 221-225. Paper spray ionization mass spectrometry: Study of a method for fast-screening analysis of pesticides in fruits and vegetables

Accred. Qual. Assur. 2015, 20, 229-231. A personal view on metrology in chemical analysis

J. Chromatogr. A 2014, 1365, 140-147. Versatile ene-thiol photoclick reaction for preparation of multimodalmonolithic silica capillary columns

J. Chromaogr. A 2014, 1355, 296-300. “Thiol-ene” photoclick chemistry as a rapid and localizable functionalization pathway for silica capillary monolithic columns

J. Am. Soc. Mass Spectrom. 2014, 25, 1853-1861. Effect of Mobile Phase on Electrospray Ionization Efficiency

J. Agric. Food Chem. 2014, 62, 5259-5268. Alternative Eluent Composition for LC-MS Analysis of Perfluoroalkyl Acids in Raw Fish Samples

Anal. Chem. 2014, 86, 4822-4830. Negative Electrospray Ionization via Deprotonation: Predicting the Ionization Efficiency

J. Chromatogr. B 2014, 967, 147-155. Study of the matrix effects and sample dilution influence on the LC-ESI-MS/MS analysis using four derivatization reagents

J. Chromatogr. B 2014, 955-956, 34-41. Matrix influence on derivatization and ionization processes during selenoamino acid liquid chromatography electrospray ionization mass spectrometric analysis

J. Mass Spectrom. 2013, 48, 695-702. Sodium adduct formation efficiency in ESI source

J. Sep. Sci. 2013, 36, 2458–2463. Ensuring repeatability and robustness of poly(glycidyl methacrylate-co-ethylene dimethacrylate) HPLC monolithic columns of 3 mm id through covalent bonding to the column wall

Anal. Methods 2013, 5, 3035-3044. Comparison of different methods aiming to account for/overcome matrix effects in LC/ESI/MS on the example of pesticide analyses

Antimicrob. Agents Chemother. 2012, 56, 4760-4764. Short versus Long Infusion of Meropenem in Very-Low-Birth-Weight Neonates

J. Am. Soc. Mass Spectrom. 2012, 23, 2051-2054. Enhanced Nebulization Efficiency of Electrospray Mass Spectrometry: Improved Sensitivity and Detection Limit

J. Chromatogr. B 2012, 904, 99-106. Comparison of amino acid derivatization reagents for LC–ESI-MS analysis. Introducing a novel phosphazene-based derivatization reagent

J. Chromatogr. A 2012, 1245, 134-142. Comparison of three buffer solutions for amino acid derivatization and following analysis by liquid chromatography electrospray mass spectrometry

Eur. J. Mass Spectrom. 2012, 18, 71-75. Influence of boric acid on ESI ionization efficiency

J. Chromatogr. A 2011, 1218, 8175-8180. Fluoroalcohols as novel buffer components for basic buffer solutions for liquid chromatography electrospray ionization mass spectrometry: Retention mechanisms

Analyst 2011, 136, 5241-5246. Analysis of selenomethylselenocysteine and selenomethionine by LC-ESI-MS/MS with diethyl ethoxymethylenemalonate derivatization

Rapid Commun. Mass Spectrom. 2011, 25, 1159-1168. Accounting for matrix effects of pesticide residue liquid chromatography/electrospray ionisation mass spectrometric determination by treatment of background mass spectra with chemometric tools

Rapid Commun. Mass Spectrom. 2011, 25, 3252-3258. Study of liquid chromatography/electrospray ionization mass spectrometry matrix effect on the example of glyphosate analysis from cereals

Analyst 2011, 136, 4587-4594. Two fluoroalcohols as components of basic buffers for liquid chromatography electrospray ionization mass spectrometric determination of antibiotic residues

Anal. Chim. Acta 2010, 672, 79-84. A sensitive method for free amino acids analysis by liquid chromatography with ultraviolet and mass spectrometric detection using precolumn derivatization with diethyl ethoxymethylenemalonate: Application to the honey analysis

Rapid Commun. Mass Spectrom. 2010, 24, 919-926. Optimization of electrospray interface and quadrupole ion trap mass spectrometer parameters in pesticide liquid chromatography/electrospray ionization mass spectrometry analysis

Int. J. Environ. Sci. Technol. 2010, 7, 307-312. Presence of fluoroquinolones and sulfonamides in urban sewage sludge and their degradation as a result of composting

Anal. Chem. 2010, 82, 2865-2872. Electrospray Ionization Efficiency Scale of Organic Compounds

J. AOAC Intl. 2010, 93, 306-314. Electrospray Ionization Matrix Effect as an Uncertainty Source in HPLC/ESI-MS Pesticide Residue Analysis

Anal. Chim. Acta 2009, 651, 75-80. Combating matrix effects in LC/ESI/MS: The extrapolative dilution approach

J. Chromatogr. A 2009, 1216, 5949-5954. Simultaneous determination of fluoroquinolones, sulfonamides and tetracyclines in sewage sludge by pressurized liquid extraction and liquid chromatography electrospray ionization-mass spectrometry

J. Chromatogr. A 2008, 1187, 58-66. Matrix effects in pesticide multi-residue analysis by liquid chromatography–mass spectrometry

J. Agric. Food Chem. 2008, 56, 10716-10720. Evaluation of the Botanical Origin of Estonian Uni- and Polyfloral Honeys by Amino Acid Content

Rapid Comm. Mass Spectrom. 2008, 22, 379-384. Towards the electrospray ionization mass spectrometry ionization efficiency scale of organic compounds

J. Chromatogr. A 2007, 1160, 227-234. “Fast peaks” in chromatograms of Sudan dyes

Food Chemistry 2007, 100, 1713-1721. The occurrence of volatile N-nitrosamines in Estonian meat products

Food Chemistry 2006, 96, 325-333. Volatile N-Nitrosamines in various fish products

J. Chromatogr. A 2005, 1126, 55-63. Uncertainty in liquid chromatographic analysis of pharmaceutical product: Influence of various uncertainty sources

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Cultural Heritage Objects

J. Mass Spectrom. 2017, 52, 603-617. Method development for the analysis of resinous materials with MALDI-FT-ICR-MS: novel internal standards and a new matrix material for negative ion mode

J. Mass Spectrom. 2017, 52, 689-700. MALDI‐FT‐ICR‐MS for archaeological lipid residue analysis

Spectrochim. Acta A 2017, 173, 175-181. Identification and classification of textile fibres using ATR-FT-IR spectroscopy with chemometric methods

J. Archaeol. Sci 2017, 78, 112-119. The adoption of pottery by north-east European hunter-gatherers: Evidence from lipid residue analysis

Antiquity 2017, 91(355), 124-138. Archaeological science and object biography: a Roman bronze lamp from Kavastu bog (Estonia)

Environmental Archaeology 2017, 22(1), 1-14. Multi-method Analysis of Avian Eggs as Grave Goods: Revealing Symbolism in Conversion Period Burials at Kukruse, NE Estonia

Constr. Build. Mater. 2016, 122, 458-464. Alkali activated construction materials: Assessing the alternative use for oil shale processing solid wastes

Anal. Bioanal. Chem. 2016, 408(13), 3373-3379. ATR-FT-IR spectral collection of conservation materials in the extended region of 4000-80 cm-1

Lethaia 2016, 49(1), 13-27. Diagenetic fate of bioapatite in linguliform brachiopods: multiple apatite phases in shells of Cambrian lingulate brachiopod Ungula ingrica (Eichwald)


Full list of publications of Cultural Heritage Objects is available here.
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Synthetic Anion Receptors, Sensors, and Related Topics

J. Comput. Aided Mol. Des. 2018, 1 – 12. Prediction of partition and distribution coefficients in various solvent pairs with COSMO-RS

Eur. J. Org. Chem. 2017, 35, 5231 – 5237. Exploring Selectivity of 22 Acyclic Urea-, Carbazole- and Indolocarbazole-Based Receptors towards 11 Monocarboxylates

J. Phys. Chem. A 2017, 121, 6823–6829. Predicting Relative Stability of Conformers in Solution with COSMO-RS

Eur. J. Org. Chem. 2017, 11, 1396 – 1406. Multidentate Anion Receptors for Binding Glyphosate Dianion: Structure and Affinity

J. Phys. Org. Chem. 2017, 30,(3) e3608. Effects of neutral and charged substituents on the infrared carbonyl stretching frequencies in phenyl and alkyl benzoates in DMSO

Chem. Eur. J. 2015, 21, 5145 – 5160. Towards the Discrimination of Carboxylates by Hydrogen-Bond Donor Anion Receptors

J. Org. Chem. 2014, 79, 2501−2513. NMR Method for Simultaneous Host−Guest Binding Constant Measurement

J. Org. Chem. 2013, 78, 7796−7808. Accurate Method To Quantify Binding in Supramolecular Chemistry

Chem. Comm. 2012, 48, 10490-10492. Unusual para-substituent effects on the intramolecular hydrogen-bond in hydrazone-based switches

Sensors 2010, 10, 4430-4455. Measurement Uncertainty Estimation in Amperometric Sensors: A Tutorial Review

Meas. Sci. Technol 2007, 18, 1877. Model-based measurement uncertainty estimation in amperometric dissolved oxygen concentration measurement

Accreditation and Quality Assurance 2004, 9, 340-348. Estimation of uncertainty in electrochemical amperometric measurement of dissolved oxygen concentration

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Metrology

Environ. Monit. Assess. 2018, 190:313 Comparative validation of amperometric and optical analyzers of dissolved oxygen: a case study

Anal. Bioanal. Chem. 2015, 407(5), 1277–1281. Using MOOCs for teaching analytical chemistry: experience at University of Tartu

Water 2013, 5(2), 420-442. Dissolved Oxygen Concentration Interlaboratory Comparison: What Can We Learn?

Anal. Chim. Acta. 2012, 741, 21-31. A highly accurate method for determination of dissolved oxygen: Gravimetric Winkler method

Anal. Chim. Acta. 2009, 648(2), 167-173. Micro-Winkler titration method for dissolved oxygen concentration measurement

Accred. Qual. Assur. 2008, 13(10), 575-579. On the accuracy of micro Winkler titration procedures: a case study