Siegrun Helm

461 total citations
26 papers, 404 citations indexed

About

Siegrun Helm is a scholar working on Organic Chemistry, Physical and Theoretical Chemistry and Materials Chemistry. According to data from OpenAlex, Siegrun Helm has authored 26 papers receiving a total of 404 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Organic Chemistry, 12 papers in Physical and Theoretical Chemistry and 9 papers in Materials Chemistry. Recurrent topics in Siegrun Helm's work include Photochemistry and Electron Transfer Studies (11 papers), Molecular Sensors and Ion Detection (5 papers) and Radical Photochemical Reactions (5 papers). Siegrun Helm is often cited by papers focused on Photochemistry and Electron Transfer Studies (11 papers), Molecular Sensors and Ion Detection (5 papers) and Radical Photochemical Reactions (5 papers). Siegrun Helm collaborates with scholars based in Germany and United States. Siegrun Helm's co-authors include Jürgen Bendig, Volker Hagen, Stephan Frings, U. Benjamin Kaupp, D. Reuter, D. Kreysig, Burkhard Wiesner, J. Bendig, Dorothea Lorenz and Stefan Hecht and has published in prestigious journals such as Angewandte Chemie International Edition, Chemical Physics Letters and Tetrahedron.

In The Last Decade

Siegrun Helm

26 papers receiving 392 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Siegrun Helm Germany 9 261 184 134 92 85 26 404
Christian Lenoble United States 8 343 1.3× 182 1.0× 140 1.0× 34 0.4× 198 2.3× 11 444
Andrew P. Billington United States 7 149 0.6× 96 0.5× 148 1.1× 188 2.0× 24 0.3× 9 376
R. S. H. Liu United States 13 116 0.4× 161 0.9× 137 1.0× 142 1.5× 40 0.5× 19 380
N. L. Zaichenko Russia 10 282 1.1× 159 0.9× 122 0.9× 35 0.4× 108 1.3× 83 393
Alvaro Fernandez‐Acebes France 11 388 1.5× 309 1.7× 171 1.3× 28 0.3× 31 0.4× 13 577
Daniel Geißler Germany 10 442 1.7× 245 1.3× 229 1.7× 190 2.1× 32 0.4× 10 609
Meigong Fan China 13 453 1.7× 197 1.1× 190 1.4× 20 0.2× 56 0.7× 43 501
Kentaro Morimitsu Japan 10 342 1.3× 268 1.5× 165 1.2× 72 0.8× 31 0.4× 10 494
Eric A. Archer United States 9 96 0.4× 245 1.3× 66 0.5× 242 2.6× 77 0.9× 10 495
Tamara C. S. Pace Canada 17 332 1.3× 339 1.8× 127 0.9× 177 1.9× 172 2.0× 28 709

Countries citing papers authored by Siegrun Helm

Since Specialization
Citations

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

Fields of papers citing papers by Siegrun Helm

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Siegrun Helm

This figure shows the co-authorship network connecting the top 25 collaborators of Siegrun Helm. A scholar is included among the top collaborators of Siegrun Helm 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 Siegrun Helm. Siegrun Helm 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.
Hagen, Volker, Stephan Frings, Burkhard Wiesner, et al.. (2003). [7‐(Dialkylamino)coumarin‐4‐yl]methyl‐Caged Compounds as Ultrafast and Effective Long‐Wavelength Phototriggers of 8Bromo‐Substituted Cyclic Nucleotides. ChemBioChem. 4(5). 434–442. 78 indexed citations
2.
Hagen, Volker, Jürgen Bendig, Stephan Frings, et al.. (2001). Highly Efficient and Ultrafast Phototriggers for cAMP and cGMP by Using Long-Wavelength UV/Vis-Activation. Angewandte Chemie International Edition. 40(6). 1045–1048. 137 indexed citations
3.
Hagen, Volker, Jürgen Bendig, Stephan Frings, et al.. (2001). Langwellig UV/Vis-anregbare, hocheffiziente und ultraschnelle Phototrigger für cAMP und cGMP. Angewandte Chemie. 113(6). 1077–1080. 28 indexed citations
4.
Hagen, Volker, Jürgen Bendig, Stephan Frings, et al.. (1999). Synthesis, photochemistry and application of (7-methoxycoumarin-4-yl)methyl-caged 8-bromoadenosine cyclic 3′,5′-monophosphate and 8-bromoguanosine cyclic 3′,5′-monophosphate photolyzed in the nanosecond time region. Journal of Photochemistry and Photobiology B Biology. 53(1-3). 91–102. 40 indexed citations
5.
Hecht, Stefan, et al.. (1999). Photochemistry and photophysics of donor-acceptor-polyenes. I: all-trans-4-dimethylamino-4′-cyano-1,4-diphenylbutadiene (DCB). Journal of Photochemistry and Photobiology A Chemistry. 123(1-3). 99–108. 26 indexed citations
6.
Bendig, J., Siegrun Helm, & Volker Hagen. (1997). (Coumarin-4-yl)Methyl Ester of cGMP and 8-Br-cGMP: Photochemical Fluorescence Enhancement. Journal of Fluorescence. 7(4). 357–361. 8 indexed citations
7.
Bendig, Jürgen & Siegrun Helm. (1990). Das Desaktivierungsverhalten des Benz[b]aeridiziniumions in Lösung. Zeitschrift für Chemie. 30(9). 326–326. 2 indexed citations
8.
Helm, Siegrun, Jürgen Bendig, & D. Kreysig. (1988). Zur dualen Fluoreszenz der Bis(acridizinium‐yl)‐Kationen. Zeitschrift für Chemie. 28(2). 63–63. 1 indexed citations
9.
Helm, Siegrun, J. Bendig, & D. Kreysig. (1988). Zum Fluoreszenzverhalten der isomeren Bis(acridiziniumyl)‐Dikationen. Journal für praktische Chemie. 330(6). 947–961. 4 indexed citations
10.
Bendig, J., Siegrun Helm, & D. Kreysig. (1986). Desaktivierungsverhalten von Arenen und Heteroarenen. Zeitschrift für Physikalische Chemie. 267O(1). 723–730. 2 indexed citations
11.
Bendig, J., Siegrun Helm, D. Kreysig, & Hartmut Schmidt. (1983). Desaktivierungsverhalten von Arenen und Heteroarenen. XXXVI. Zum Lösungsmittel‐ und Temperatureinfluß auf das Desaktivierungsverhalten von 9, 9′‐Bis(acridizinium‐yl) bei hohen Konzentrationen. Journal für praktische Chemie. 325(2). 225–231. 2 indexed citations
12.
13.
Bendig, J., Siegrun Helm, D. Kreysig, & A. Kawski. (1982). Die Abhängigkeit der Fluoreszenzanisotropie des Acridizinium- und 9,9'-Bis(acridizimum-yl)perchlorates vom Lösungsmittel. Zeitschrift für Physikalische Chemie. 263O(1). 766–776. 2 indexed citations
14.
Bendig, Jürgen, et al.. (1979). The dependence of the heavy atom induced quenching of the fluorescence of n-methylacridone upon the solvent. Advances in Molecular Relaxation and Interaction Processes. 14(2). 121–132. 8 indexed citations
15.
Bendig, J., Siegrun Helm, & D. Kreysig. (1978). External heavy atom quenching of the fluorescence of the acridizinium ion via charge-transfer complexes. Chemical Physics Letters. 54(3). 466–468. 13 indexed citations
16.
Bendig, Jürgen, et al.. (1978). Deactivation behaviour of arenes and heteroarenes. VI. quenching of the fluorescence of heteroarenium cations at high concentrations. Advances in Molecular Relaxation and Interaction Processes. 12(4). 289–300. 8 indexed citations
17.
Bendig, Jürgen, Siegrun Helm, & D. Kreysig. (1977). Löschung der Fluoreszenz des Akridiziniumions durch polyhalogensubstituierte Alkane. Zeitschrift für Chemie. 17(12). 450–451. 4 indexed citations
18.
Bendig, Jürgen, Siegrun Helm, & D. Kreysig. (1977). Desaktivierungsverhalten von Arenen und Heteroarenen. II. Fluoreszenzlöschung des Acridiziniumions durch äußeren Schweratomeffekt. Journal für praktische Chemie. 319(5). 807–812. 9 indexed citations
19.
Schwetlick, Klaus & Siegrun Helm. (1966). Reaktionen substituierter alkylradikale in lösung—II. Tetrahedron. 22(3). 793–802. 3 indexed citations
20.
Helm, Siegrun, et al.. (1965). Zur Gaschromatographie der Monoterpene [1]. Zeitschrift für Chemie. 5(8). 309–310. 2 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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