Karl Kaupmees

2.5k total citations
34 papers, 2.0k citations indexed

About

Karl Kaupmees is a scholar working on Organic Chemistry, Spectroscopy and Physical and Theoretical Chemistry. According to data from OpenAlex, Karl Kaupmees has authored 34 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Organic Chemistry, 12 papers in Spectroscopy and 6 papers in Physical and Theoretical Chemistry. Recurrent topics in Karl Kaupmees's work include Chemical Reaction Mechanisms (11 papers), Mass Spectrometry Techniques and Applications (10 papers) and Analytical Chemistry and Chromatography (9 papers). Karl Kaupmees is often cited by papers focused on Chemical Reaction Mechanisms (11 papers), Mass Spectrometry Techniques and Applications (10 papers) and Analytical Chemistry and Chromatography (9 papers). Karl Kaupmees collaborates with scholars based in Estonia, Germany and France. Karl Kaupmees's co-authors include Ivo Leito, Anneli Kruve, Jaanus Liigand, Ivari Kaljurand, Ilmar A. Koppel, Aleksander Trummal, Agnes Kütt, Nikita Tolstoluzhsky, Magnus Rueping and Jaan Saame and has published in prestigious journals such as Angewandte Chemie International Edition, Analytical Chemistry and Nature Chemistry.

In The Last Decade

Karl Kaupmees

34 papers receiving 2.0k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Karl Kaupmees Estonia 22 993 441 408 386 208 34 2.0k
Paolo Lo Meo Italy 25 1.2k 1.2× 212 0.5× 224 0.5× 399 1.0× 302 1.5× 98 2.0k
Walter Panzeri Italy 29 891 0.9× 285 0.6× 601 1.5× 389 1.0× 171 0.8× 83 2.3k
Ottavia Giuffrè Italy 26 482 0.5× 406 0.9× 224 0.5× 174 0.5× 83 0.4× 92 1.7k
Vladislav Tomišić Croatia 22 640 0.6× 485 1.1× 212 0.5× 308 0.8× 78 0.4× 82 1.5k
Roberto Bianchini Italy 24 712 0.7× 230 0.5× 311 0.8× 241 0.6× 80 0.4× 76 1.6k
Béla Fiser Hungary 23 964 1.0× 215 0.5× 185 0.5× 213 0.6× 265 1.3× 129 1.8k
Hui Wu China 26 1.1k 1.1× 185 0.4× 734 1.8× 223 0.6× 205 1.0× 103 2.2k
Zhishan Su China 30 2.0k 2.0× 260 0.6× 531 1.3× 367 1.0× 481 2.3× 162 3.0k
Tatsuya Oshima Japan 28 481 0.5× 419 1.0× 383 0.9× 489 1.3× 363 1.7× 171 2.6k
Tamer Shoeib Egypt 29 520 0.5× 657 1.5× 135 0.3× 421 1.1× 232 1.1× 105 2.5k

Countries citing papers authored by Karl Kaupmees

Since Specialization
Citations

This map shows the geographic impact of Karl Kaupmees's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Karl Kaupmees with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karl Kaupmees more than expected).

Fields of papers citing papers by Karl Kaupmees

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karl Kaupmees. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Karl Kaupmees. The network helps show where Karl Kaupmees may publish in the future.

Co-authorship network of co-authors of Karl Kaupmees

This figure shows the co-authorship network connecting the top 25 collaborators of Karl Kaupmees. A scholar is included among the top collaborators of Karl Kaupmees based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Karl Kaupmees. Karl Kaupmees is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
List, Benjamin, Denis Höfler, Karl Kaupmees, & Ivo Leito. (2021). A Chiral Sulfoxide-Based C–H Acid. Synlett. 33(1). 45–47. 1 indexed citations
2.
Liigand, Piia, Jaanus Liigand, Karl Kaupmees, & Anneli Kruve. (2020). 30 Years of research on ESI/MS response: Trends, contradictions and applications. Analytica Chimica Acta. 1152. 238117–238117. 38 indexed citations
3.
Peets, Pilleriin, Karl Kaupmees, Signe Vahur, & Ivo Leito. (2019). Reflectance FT-IR spectroscopy as a viable option for textile fiber identification. Heritage Science. 7(1). 124 indexed citations
4.
Zhu, Hui, et al.. (2019). Cooperative Organocatalysis: A Systematic Investigation of Covalently Linked Organophosphoric Acids for the Stereoselective Transfer Hydrogenation of Quinolines. European Journal of Organic Chemistry. 2019(31-32). 5190–5195. 12 indexed citations
5.
Bae, Han Yong, Denis Höfler, Philip S. J. Kaib, et al.. (2018). Approaching sub-ppm-level asymmetric organocatalysis of a highly challenging and scalable carbon–carbon bond forming reaction. Nature Chemistry. 10(8). 888–894. 89 indexed citations
6.
Kütt, Agnes, Sigrid Selberg, Ivari Kaljurand, et al.. (2018). pKa values in organic chemistry – Making maximum use of the available data. Tetrahedron Letters. 59(42). 3738–3748. 154 indexed citations
7.
Paenurk, Eno, Karl Kaupmees, Daniel Himmel, et al.. (2017). A unified view to Brønsted acidity scales: do we need solvated protons?. Chemical Science. 8(10). 6964–6973. 73 indexed citations
8.
Tussing, Sebastian, Karl Kaupmees, & Jan Paradies. (2016). Structure–Reactivity Relationship in the Frustrated Lewis Pair (FLP)‐Catalyzed Hydrogenation of Imines. Chemistry - A European Journal. 22(22). 7422–7426. 48 indexed citations
9.
Liigand, Piia, Karl Kaupmees, & Anneli Kruve. (2016). Ionization Efficiency of Doubly Charged Ions Formed from Polyprotic Acids in Electrospray Negative Mode. Journal of the American Society for Mass Spectrometry. 27(7). 1211–1218. 8 indexed citations
10.
Leito, Ivo, Ilmar A. Koppel, Ilmar A. Koppel, et al.. (2015). Basicity Limits of Neutral Organic Superbases. Angewandte Chemie. 127(32). 9394–9397. 12 indexed citations
11.
Leito, Ivo, Ilmar A. Koppel, Ilmar A. Koppel, et al.. (2015). Basicity Limits of Neutral Organic Superbases. Angewandte Chemie International Edition. 54(32). 9262–9265. 75 indexed citations
12.
Abboud, José‐Luis M., Ilmar A. Koppel, Einar Uggerud, et al.. (2015). Solution and Gas‐Phase Acidities of all‐trans (all‐E) Retinoic Acid: An Experimental and Computational Study. Chemistry - A European Journal. 21(31). 11238–11243. 1 indexed citations
13.
Isaac, Kévin, Pascal Retailleau, Gilles Frison, et al.. (2014). Planar Chiral Phosphoric Acids with Biphenylene-Tethered Paracyclophane Scaffolds: Synthesis, Characterization, and Catalytic Screening. The Journal of Organic Chemistry. 79(20). 9639–9646. 22 indexed citations
14.
Kruve, Anneli, Karl Kaupmees, Jaanus Liigand, & Ivo Leito. (2014). Negative Electrospray Ionization via Deprotonation: Predicting the Ionization Efficiency. Analytical Chemistry. 86(10). 4822–4830. 106 indexed citations
15.
Kaupmees, Karl, Ivari Kaljurand, & Ivo Leito. (2014). Influence of Water Content on Basicities in Acetonitrile. Journal of Solution Chemistry. 43(7). 1270–1281. 9 indexed citations
16.
Kaupmees, Karl, Nikita Tolstoluzhsky, Sadiya Raja, Magnus Rueping, & Ivo Leito. (2013). On the Acidity and Reactivity of Highly Effective Chiral Brønsted Acid Catalysts: Establishment of an Acidity Scale. Angewandte Chemie International Edition. 52(44). 11569–11572. 156 indexed citations
17.
Kaupmees, Karl, Nikita Tolstoluzhsky, Sebastian Raja, Magnus Rueping, & Ivo Leito. (2013). On the Acidity and Reactivity of Highly Effective Chiral Brønsted Acid Catalysts: Establishment of an Acidity Scale. Angewandte Chemie. 125(44). 11783–11786. 57 indexed citations
18.
Greb, Lutz, Sebastian Tussing, Birgitta Schirmer, et al.. (2013). Electronic effects of triarylphosphines in metal-free hydrogen activation: a kinetic and computational study. Chemical Science. 4(7). 2788–2788. 90 indexed citations
19.
Saame, Jaan, et al.. (2013). Sehr starke Organosuperbasen durch Verknüpfung von Imidazol‐ und Guanidinbasen – Synthese, Struktur und Basizität. Angewandte Chemie. 126(5). 1459–1462. 15 indexed citations
20.
Saame, Jaan, et al.. (2013). Very Strong Organosuperbases Formed by Combining Imidazole and Guanidine Bases: Synthesis, Structure, and Basicity. Angewandte Chemie International Edition. 53(5). 1435–1438. 73 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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2026