Klaus Schaper

1.0k total citations
30 papers, 792 citations indexed

About

Klaus Schaper is a scholar working on Organic Chemistry, Materials Chemistry and Molecular Biology. According to data from OpenAlex, Klaus Schaper has authored 30 papers receiving a total of 792 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Organic Chemistry, 9 papers in Materials Chemistry and 8 papers in Molecular Biology. Recurrent topics in Klaus Schaper's work include Photochromic and Fluorescence Chemistry (8 papers), Photoreceptor and optogenetics research (4 papers) and Radical Photochemical Reactions (4 papers). Klaus Schaper is often cited by papers focused on Photochromic and Fluorescence Chemistry (8 papers), Photoreceptor and optogenetics research (4 papers) and Radical Photochemical Reactions (4 papers). Klaus Schaper collaborates with scholars based in Germany and United States. Klaus Schaper's co-authors include Christian Ganter, Kathrin Verlinden, Annika Liske, Hannes Buhl, Joachim K. Seydel, Ellen Wempe, Hans Peter Cordes, Helmut Görner, Kyle R. Gee and George P. Hess and has published in prestigious journals such as Angewandte Chemie International Edition, The Journal of Chemical Physics and Biochemistry.

In The Last Decade

Klaus Schaper

30 papers receiving 776 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Klaus Schaper Germany 16 496 166 157 90 77 30 792
Sergiy М. Kovalenko Ukraine 16 703 1.4× 167 1.0× 242 1.5× 30 0.3× 18 0.2× 150 1.1k
Ante Nagl Croatia 16 583 1.2× 98 0.6× 217 1.4× 127 1.4× 11 0.1× 80 836
Vera Deneva Bulgaria 14 243 0.5× 203 1.2× 81 0.5× 24 0.3× 34 0.4× 31 584
Elżbieta Bednarek Poland 21 292 0.6× 132 0.8× 416 2.6× 38 0.4× 15 0.2× 91 1.1k
Prema G. Vasudev India 19 733 1.5× 85 0.5× 1.0k 6.5× 74 0.8× 26 0.3× 52 1.4k
Jeong Tae Lee South Korea 17 410 0.8× 565 3.4× 354 2.3× 112 1.2× 35 0.5× 36 1.2k
Olfa Noureddine Tunisia 11 432 0.9× 111 0.7× 77 0.5× 71 0.8× 14 0.2× 14 741
Abir Sagaama Tunisia 12 541 1.1× 83 0.5× 74 0.5× 59 0.7× 13 0.2× 16 835
Anna Bielenica Poland 17 583 1.2× 71 0.4× 276 1.8× 66 0.7× 29 0.4× 63 877
Rajeev Sakhuja India 22 877 1.8× 227 1.4× 310 2.0× 65 0.7× 52 0.7× 85 1.4k

Countries citing papers authored by Klaus Schaper

Since Specialization
Citations

This map shows the geographic impact of Klaus Schaper'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 Klaus Schaper with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Klaus Schaper more than expected).

Fields of papers citing papers by Klaus Schaper

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Klaus Schaper. 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 Klaus Schaper. The network helps show where Klaus Schaper may publish in the future.

Co-authorship network of co-authors of Klaus Schaper

This figure shows the co-authorship network connecting the top 25 collaborators of Klaus Schaper. A scholar is included among the top collaborators of Klaus Schaper 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 Klaus Schaper. Klaus Schaper 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.
Schaper, Klaus, et al.. (2021). Synthesis, Reactivity and Electronic Properties of Quinazolin‐2‐one‐Based N‐Heterocyclic Carbenes. European Journal of Inorganic Chemistry. 2022(2). 7 indexed citations
2.
Schaper, Klaus & Thomas J. J. Müller. (2018). Thiophene Syntheses by Ring Forming Multicomponent Reactions. Topics in Current Chemistry. 376(5). 38–38. 19 indexed citations
3.
Liske, Annika, Kathrin Verlinden, Hannes Buhl, Klaus Schaper, & Christian Ganter. (2013). Determining the π-Acceptor Properties of N-Heterocyclic Carbenes by Measuring the 77Se NMR Chemical Shifts of Their Selenium Adducts. Organometallics. 32(19). 5269–5272. 322 indexed citations
4.
Kleinschmidt, Martin, et al.. (2011). On the Photophysics of 1,6‐Diphenyl‐1,3,5‐Hexatriene Isomers and Rotamers. ChemPhysChem. 12(10). 1872–1879. 11 indexed citations
5.
Häber, Thomas, et al.. (2011). Fourier transform infrared spectroscopy of 2′-deoxycytidine aggregates in CDCl3 solutions. The Journal of Chemical Physics. 134(11). 115103–115103. 8 indexed citations
6.
7.
Marian, Christel M., et al.. (2010). Diphenylhexatrienes as Photoprotective Agents for Ultrasensitive Fluorescence Detection. The Journal of Physical Chemistry A. 114(12). 4099–4108. 17 indexed citations
8.
Schaper, Klaus, Mihajlo Etinski, & Timo Fleig. (2009). Theoretical Investigation of the Excited States of 2‐Nitrobenzyl and 4,5‐Methylendioxy‐2‐nitrobenzyl Caging Groups†. Photochemistry and Photobiology. 85(5). 1075–1081. 23 indexed citations
9.
Schaper, Klaus, et al.. (2008). Die Sozialordnung der Bundesrepublik Deutschland. Campus eBooks. 6 indexed citations
10.
Schaper, Klaus. (2008). NMR–spectroscopic investigation of o‐nitrosobenzoic acid. Magnetic Resonance in Chemistry. 46(12). 1163–1167. 3 indexed citations
11.
Martin, Hans‐Dieter, Klaus Schaper, Hansgeorg Ernst, et al.. (2008). 3,3′‐Dihydroxyisorenieratene, a Natural Carotenoid with Superior Antioxidant and Photoprotective Properties. Angewandte Chemie International Edition. 48(2). 400–403. 42 indexed citations
12.
Martin, Hans‐Dieter, Klaus Schaper, Hansgeorg Ernst, et al.. (2008). 3,3′‐Dihydroxyisorenieratin, ein natürliches Carotinoid mit überlegenen antioxidativen und photoprotektiven Eigenschaften. Angewandte Chemie. 121(2). 406–410. 1 indexed citations
13.
Schaper, Klaus, et al.. (2007). Photoprocesses of Molecules with 2‐Nitrobenzyl Protecting Groups and Caged Organic Acids. Photochemistry and Photobiology. 84(1). 162–171. 38 indexed citations
14.
Schaper, Klaus, et al.. (1998). Substituted Xanthones as Antimycobacterial Agents, Part 2: Antimycobacterial Activity. Archiv der Pharmazie. 331(5). 193–197. 15 indexed citations
15.
Schaper, Klaus, et al.. (1998). Substituted Xanthones as Antimycobacterial Agents, Part 2: Antimycobacterial Activity. Archiv der Pharmazie. 331(5). 193–197. 1 indexed citations
16.
Niu, Li, Kyle R. Gee, Klaus Schaper, & George P. Hess. (1996). Synthesis and Photochemical Properties of a Kainate Precursor and Activation of Kainate and AMPA Receptor Channels on a Microsecond Time Scale. Biochemistry. 35(6). 2030–2036. 21 indexed citations
17.
Druska, Peter, et al.. (1995). Solid state photoelectron spectroscopy of carotenoids. Journal of Molecular Structure. 347. 429–437. 1 indexed citations
18.
Gee, Kyle R., Li Niu, Klaus Schaper, & George P. Hess. (1995). Caged Bioactive Carboxylates. Synthesis, Photolysis Studies, and Biological Characterization of a New Caged N-Methyl-D-aspartic Acid. The Journal of Organic Chemistry. 60(13). 4260–4263. 16 indexed citations
19.
Seydel, Joachim K., Klaus Schaper, Ellen Wempe, & Hans Peter Cordes. (1976). Mode of action and quantitative structure-activity correlations of tuberculostatic drugs of the isonicotinic acid hydrazide type. Journal of Medicinal Chemistry. 19(4). 483–492. 64 indexed citations
20.
Bock, Lothar, George H. Miller, Klaus Schaper, & Joachim K. Seydel. (1974). Sulfonamide structure-activity relations in a cell-free system. 2. Proof for the formation of a sulfonamide-containing folate analog. Journal of Medicinal Chemistry. 17(1). 23–28. 44 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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