Paul A. Karr

7.9k total citations
77 papers, 1.6k citations indexed

About

Paul A. Karr is a scholar working on Materials Chemistry, Organic Chemistry and Physical and Theoretical Chemistry. According to data from OpenAlex, Paul A. Karr has authored 77 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 73 papers in Materials Chemistry, 26 papers in Organic Chemistry and 19 papers in Physical and Theoretical Chemistry. Recurrent topics in Paul A. Karr's work include Porphyrin and Phthalocyanine Chemistry (68 papers), Luminescence and Fluorescent Materials (28 papers) and Fullerene Chemistry and Applications (21 papers). Paul A. Karr is often cited by papers focused on Porphyrin and Phthalocyanine Chemistry (68 papers), Luminescence and Fluorescent Materials (28 papers) and Fullerene Chemistry and Applications (21 papers). Paul A. Karr collaborates with scholars based in United States, Japan and Spain. Paul A. Karr's co-authors include Francis D’Souza, Melvin E. Zandler, Osamu Ito, Jonathan P. Hill, Vladimir N. Nesterov, Gary N. Lim, Navaneetha K. Subbaiyan, Katsuhiko Ariga, Yasuyuki Araki and Amy L. McCarty and has published in prestigious journals such as Journal of the American Chemical Society, Angewandte Chemie International Edition and The Journal of Chemical Physics.

In The Last Decade

Paul A. Karr

75 papers receiving 1.6k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Paul A. Karr United States	25	1.4k	561	402	327	242	77	1.6k
Francesco Nastasi Italy	23	870 0.6×	291 0.5×	340 0.8×	162 0.5×	209 0.9×	63	1.3k
Pyosang Kim South Korea	21	952 0.7×	327 0.6×	240 0.6×	236 0.7×	132 0.5×	48	1.2k
Yuichi Terazono United States	19	996 0.7×	286 0.5×	546 1.4×	181 0.6×	186 0.8×	34	1.6k
Beata Koszarna Poland	20	1.3k 0.9×	448 0.8×	220 0.5×	281 0.9×	124 0.5×	44	1.7k
Catherine E. McCusker United States	23	954 0.7×	427 0.8×	516 1.3×	246 0.8×	102 0.4×	32	1.6k
Shigeyuki Yagi Japan	28	1.4k 1.0×	623 1.1×	668 1.7×	235 0.7×	452 1.9×	120	2.1k
Gabriel Canard France	19	1.4k 1.0×	380 0.7×	735 1.8×	200 0.6×	190 0.8×	64	1.7k
Arounaguiry Ambroise United States	14	1.0k 0.7×	455 0.8×	280 0.7×	230 0.7×	169 0.7×	15	1.4k
Aaron A. Rachford United States	21	883 0.6×	428 0.8×	622 1.5×	317 1.0×	116 0.5×	30	1.5k
Jeyaraman Sankar India	23	1.4k 1.0×	549 1.0×	240 0.6×	154 0.5×	323 1.3×	63	1.8k

Countries citing papers authored by Paul A. Karr

Since Specialization

Citations

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

Fields of papers citing papers by Paul A. Karr

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Paul A. Karr. 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 Paul A. Karr. The network helps show where Paul A. Karr may publish in the future.

Co-authorship network of co-authors of Paul A. Karr

This figure shows the co-authorship network connecting the top 25 collaborators of Paul A. Karr. A scholar is included among the top collaborators of Paul A. Karr 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 Paul A. Karr. Paul A. Karr is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Gobeze, Habtom B., Youngwoo Jang, Marı́a J. Gómez-Escalonilla, et al.. (2025). Click-assembled N-graphene–C ₆₀ hybrids for ultrafast electron transfer. Chemical Science. 16(44). 20906–20913.

Karr, Paul A., et al.. (2025). Nickel porphyrin-C₆₀ dyads: Significance of low-lying porphyrin orbitals to suppress excited charge and energy transfer. Journal of Porphyrins and Phthalocyanines. 29(03n04). 354–366. 2 indexed citations

Ortíz, Javier, et al.. (2025). Intervalence Charge Transfer and Exothermic and Isoenergetic Symmetry Breaking Charge Separation in Far‐Red Capturing Zinc Phthalocyanine Dimers. Angewandte Chemie International Edition. 64(22). e202502516–e202502516. 5 indexed citations

Karr, Paul A., et al.. (2024). Excited Charge Transfer Promoted Electron Transfer in all Perylenediimide Derived, Wide‐Band Capturing Conjugates: A Mimicry of the Early Events of Natural Photosynthesis. ChemPlusChem. 89(11). e202400348–e202400348. 4 indexed citations

Karr, Paul A., et al.. (2023). Symmetry breaking charge transfer leading to charge separation in a far-red absorbing bisstyryl-BODIPY dimer. Chemical Science. 15(3). 906–913. 25 indexed citations

Shao, Shuai, et al.. (2023). Panchromatic Light‐Capturing Bis‐styryl BODIPY‐Perylenediimide Donor‐Acceptor Constructs: Occurrence of Sequential Energy Transfer Followed by Electron Transfer. Chemistry - A European Journal. 29(56). e202301686–e202301686. 4 indexed citations

Chahal, Mandeep K., Subrata Maji, Yoshitaka Matsushita, et al.. (2022). Persistent microporosity of a non-planar porphyrinoid based on multiple supramolecular interactions for nanomechanical sensor applications. Materials Chemistry Frontiers. 7(2). 325–332. 5 indexed citations

Seetharaman, Sairaman, et al.. (2022). Quadrupolar Ultrafast Charge Transfer in Diaminoazobenzene‐Bridged Perylenediimide Triads. Chemistry - A European Journal. 28(13). e202104574–e202104574. 2 indexed citations

Matsushita, Yoshitaka, Jan Labuta, Paul A. Karr, et al.. (2021). Pyrazinacenes exhibit on-surface oxidation-state-dependent conformational and self-assembly behaviours. Communications Chemistry. 4(1). 29–29. 12 indexed citations

10.

Zarrabi, Niloofar, Sairaman Seetharaman, Paul A. Karr, et al.. (2020). A charge transfer state induced by strong exciton coupling in a cofacial μ-oxo-bridged porphyrin heterodimer. Physical Chemistry Chemical Physics. 23(2). 960–970. 40 indexed citations

11.

Zink‐Lorre, Nathalie, Enrique Font‐Sanchis, Sairaman Seetharaman, et al.. (2019). Directly Linked Zinc Phthalocyanine–Perylenediimide Dyads and a Triad for Ultrafast Charge Separation. Chemistry - A European Journal. 25(43). 10123–10132. 10 indexed citations

12.

Ortíz, Javier, Ángela Sastre‐Santos, Fernando Fernández‐Lázaro, et al.. (2019). A zinc phthalocyanine–benzoperylenetriimide conjugate for solvent dependent ultrafast energy vs. electron transfer. Chemical Communications. 55(99). 14946–14949. 6 indexed citations

13.

Seetharaman, Sairaman, Luis Martín‐Gomis, Georgios Charalambidis, et al.. (2018). Supramolecular complex of a fused zinc phthalocyanine–zinc porphyrin dyad assembled by two imidazole-C ₆₀ units: ultrafast photoevents. Physical Chemistry Chemical Physics. 20(11). 7798–7807. 18 indexed citations

14.

Ngo, Thien H., Jan Labuta, Gary N. Lim, et al.. (2017). Porphyrinoid rotaxanes: building a mechanical picket fence. Chemical Science. 8(9). 6679–6685. 30 indexed citations

15.

Shao, Shuai, Habtom B. Gobeze, Paul A. Karr, & Francis D’Souza. (2015). Ultrafast Photoinduced Charge Separation in Wide‐Band‐Capturing Self‐Assembled Supramolecular Bis(donor styryl)BODIPY–Fullerene Conjugates. Chemistry - A European Journal. 21(45). 16005–16016. 20 indexed citations

16.

Bandi, Venugopal, Habtom B. Gobeze, Vladimir N. Nesterov, Paul A. Karr, & Francis D’Souza. (2014). Phenothiazine–azaBODIPY–fullerene supramolecules: syntheses, structural characterization, and photochemical studies. Physical Chemistry Chemical Physics. 16(46). 25537–25547. 23 indexed citations

17.

KC, Chandra B., Kei Ohkubo, Paul A. Karr, Shunichi Fukuzumi, & Francis D’Souza. (2013). A ‘two-point’ bound zinc porphyrin–zinc phthalocyanine–fullerene supramolecular triad for sequential energy and electron transfer. Chemical Communications. 49(69). 7614–7614. 36 indexed citations

18.

Schumacher, Amy Lea, Atula S. D. Sandanayaka, Jonathan P. Hill, et al.. (2007). Supramolecular Triad and Pentad Composed of Zinc–Porphyrin(s), Oxoporphyrinogen, and Fullerene(s): Design and Electron‐Transfer Studies. Chemistry - A European Journal. 13(16). 4628–4635. 32 indexed citations

19.

D’Souza, Francis, Raghu Chitta, Suresh Gadde, et al.. (2006). Photosynthetic Reaction Center Mimicry of a “Special Pair” Dimer Linked to Electron Acceptors by a Supramolecular Approach: Self‐Assembled Cofacial Zinc Porphyrin Dimer Complexed with Fullerene(s). Chemistry - A European Journal. 13(3). 916–922. 64 indexed citations

20.

El‐Khouly, Mohamed E., Yasuyuki Araki, Osamu Ito, et al.. (2005). Spectral, electrochemical, and photophysical studies of a magnesium porphyrin–fullerene dyad. Physical Chemistry Chemical Physics. 7(17). 3163–3163. 40 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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