List of Publications

Acid-base Studies

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

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

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

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

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

Anal. Chem. 2017, 89, 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

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

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. 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. 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

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, 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

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

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

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. MS 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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Matrix effect in LC/ESI/MS analyses

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

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

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

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

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

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

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

Anal. Chim. Acta 2008, 1187, 58-66. Matrix effects in pesticide multi-residue analysis by liquid chromatography–mass spectrometry

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Cultural Heritage Objects

List of publications is available: here

 

Synthetic Anion Receptors, Sensors, and Related Topics

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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