Hisashi O̅kawa

13.6k total citations · 2 hit papers
362 papers, 12.3k citations indexed

About

Hisashi O̅kawa is a scholar working on Electronic, Optical and Magnetic Materials, Oncology and Inorganic Chemistry. According to data from OpenAlex, Hisashi O̅kawa has authored 362 papers receiving a total of 12.3k indexed citations (citations by other indexed papers that have themselves been cited), including 264 papers in Electronic, Optical and Magnetic Materials, 256 papers in Oncology and 177 papers in Inorganic Chemistry. Recurrent topics in Hisashi O̅kawa's work include Magnetism in coordination complexes (260 papers), Metal complexes synthesis and properties (256 papers) and Lanthanide and Transition Metal Complexes (112 papers). Hisashi O̅kawa is often cited by papers focused on Magnetism in coordination complexes (260 papers), Metal complexes synthesis and properties (256 papers) and Lanthanide and Transition Metal Complexes (112 papers). Hisashi O̅kawa collaborates with scholars based in Japan, United Kingdom and Canada. Hisashi O̅kawa's co-authors include Masaaki Ohba, Sigeo Kida, Naohide Matsumoto, David E. Fenton, Hideki Furutachi, Hiroshi Sakiyama, Masayuki Koikawa, Hiroko Tamaki, Nobuo Fukita and Masahiro Mikuriya 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

Hisashi O̅kawa

361 papers receiving 11.7k citations

Hit Papers

Design of metal-complex magnets. Syntheses and magnetic p... 1992 2026 2003 2014 1992 2000 200 400 600
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Design of metal-complex magnets. Syntheses and magnetic properties of mixed-metal assemblies {NBu4[MCr(ox)3]}x (NBu4+ = tetra(n-butyl)ammonium ion; ox2- = oxalate ion; M = Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+)
    1992 697 citations Naohide Matsumoto, Masayuki Koikawa et al. profile →
  2. Synthesis and magnetism of multi-dimensional cyanide-bridged bimetallic assemblies
    2000 646 citations Masaaki Ohba, Hisashi O̅kawa profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hisashi O̅kawa Japan 51 8.5k 7.0k 5.8k 5.8k 2.1k 362 12.3k
Laurence K. Thompson Canada 55 7.5k 0.9× 5.4k 0.8× 4.5k 0.8× 5.0k 0.9× 2.5k 1.2× 260 10.2k
Naohide Matsumoto Japan 50 8.0k 0.9× 5.4k 0.8× 5.8k 1.0× 3.9k 0.7× 1.8k 0.8× 270 10.5k
Phalguni Chaudhuri Germany 53 5.1k 0.6× 5.2k 0.7× 3.6k 0.6× 4.4k 0.8× 2.4k 1.1× 186 8.9k
Jaap G. Haasnoot Netherlands 54 6.1k 0.7× 3.7k 0.5× 4.3k 0.7× 5.1k 0.9× 3.1k 1.5× 270 9.9k
William E. Hatfield United States 48 6.2k 0.7× 4.2k 0.6× 3.4k 0.6× 4.1k 0.7× 1.7k 0.8× 300 8.9k
Xavier Soláns Spain 60 7.7k 0.9× 6.8k 1.0× 5.2k 0.9× 6.6k 1.1× 7.8k 3.6× 624 16.5k
Joan Ribas Spain 69 12.0k 1.4× 10.1k 1.4× 7.3k 1.2× 6.4k 1.1× 2.1k 1.0× 354 15.2k
Malcolm A. Halcrow United Kingdom 48 8.4k 1.0× 4.7k 0.7× 6.1k 1.0× 4.1k 0.7× 2.2k 1.0× 270 11.3k
Catalina Ruíz-Pérez Spain 54 7.0k 0.8× 6.3k 0.9× 4.8k 0.8× 2.5k 0.4× 1.3k 0.6× 257 9.7k
Jon A. McCleverty United Kingdom 49 4.4k 0.5× 4.7k 0.7× 3.7k 0.6× 3.7k 0.6× 5.8k 2.7× 356 11.5k

Countries citing papers authored by Hisashi O̅kawa

Since Specialization
Citations

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

Fields of papers citing papers by Hisashi O̅kawa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hisashi O̅kawa

This figure shows the co-authorship network connecting the top 25 collaborators of Hisashi O̅kawa. A scholar is included among the top collaborators of Hisashi O̅kawa 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 Hisashi O̅kawa. Hisashi O̅kawa 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.
Shiga, Takuya, et al.. (2012). One‐Dimensional 3d–3d–4f Trimetallic Assemblies Consisting of CuII2LnIII Trinuclear Complexes and Hexacyanometallate. European Journal of Inorganic Chemistry. 2012(16). 2784–2791. 23 indexed citations
2.
Ohba, Masaaki, et al.. (2008). Characterization of a Fluoride-bridged Mixed-valent Tetrairon(II,II,III,III) Complex. Chemistry Letters. 38(1). 24–25. 4 indexed citations
3.
Shiga, Takuya, et al.. (2006). Dinuclear Copper(II) Complexes of a Macrocyclic Compartmental Ligand in Two Isomeric Forms. Exogenous Ion Effect upon Ligand Isomerism. Bulletin of the Chemical Society of Japan. 79(6). 881–885. 21 indexed citations
4.
Furutachi, Hideki, Shuhei Fujinami, Masatatsu Suzuki, & Hisashi O̅kawa. (1999). A Rare .MU.3-.ETA.1,.ETA.2 Peroxo Bridge between Two CoIIIPbII Dinuclear Units and Hydrolytic Conversion into a Hydroxo-Bridged CoIIIPbII Complex.. Chemistry Letters. 763–764. 1 indexed citations
5.
Miyasaka, Hitoshi, Hisashi O̅kawa, & Naohide Matsumoto. (1999). Ferrimagnetic Property of Two-Dimensional Layered Compound K[Mn(3-MeOsalen)]2[Cr(CN)6]·H2O. Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals. 335(1). 303–311. 9 indexed citations
6.
Furutachi, Hideki, Shuhei Fujinami, Masatatsu Suzuki, & Hisashi O̅kawa. (1998). Reversible Oxygenation of a μ-Acetato-di(μ-phenoxo)dicobalt(II) Core Complex and Crystal Structure of Its Oxygenated Complex. Chemistry Letters. 27(8). 779–780. 4 indexed citations
7.
Fenton, David E. & Hisashi O̅kawa. (1997). Unsymmetric Dinucleating Ligands for Metallobiosite Modelling. Chemische Berichte. 130(4). 433–442. 105 indexed citations
8.
Sakamoto, Masatomi, Hiroshi Sakiyama, Yutaka Fukuda, et al.. (1997). Synthesis and properties of copper(II)-lanthanide(III) complexes of N,N′-bis(3-formyl-5-methylsalicylidene)-1,3-propanediamine. Polyhedron. 16(19). 3345–3351. 23 indexed citations
9.
Miyasaka, Hitoshi, Naohide Matsumoto, Hisashi O̅kawa, et al.. (1995). Zweidimensionale Netzwerkstruktur und metamagnetische Eigenschaften des 2:1‐Komplexes aus [Mn(3‐MeOsalen)(H2O)]ClO4 und K3[Fe(CN)6]. Angewandte Chemie. 107(13-14). 1565–1568. 18 indexed citations
10.
Mikuriya, Masahiro, et al.. (1995). Syntheses and Structural Characterization of Dinuclear and Trinuclear Iron(II) Complexes of Tridentate Thiolic Ligands with an NNS Donor Set. Bulletin of the Chemical Society of Japan. 68(2). 574–580. 16 indexed citations
11.
Matsumoto, Naohide, et al.. (1993). Imidazolate-bridged copper(II) complexes with infinite zigzag-chain and tetranuclear structures formed by deprotonation and self-assembly. Journal of the Chemical Society Dalton Transactions. 2157–2162. 32 indexed citations
12.
O̅kawa, Hisashi, et al.. (1991). Synthesis and properties of binuclear M(II)-Sn(IV)(CH3)2 (M=Cu, Co) complexes of N,N′-bis(3-carboxysalicylidene)ethylenediamine. Inorganica Chimica Acta. 180(1). 47–51. 4 indexed citations
13.
Sakiyama, Hiroshi, Hisashi O̅kawa, Naohide Matsumoto, Sigeo Kida, & Ichiro Murase. (1989). Conformation-control in planar metal complexes (Cu2+, Pd2+, Pt2+) of ethylenediamine derivatives with a chiral N-substituent and interpretation of CD spectra based on regional rule. Inorganica Chimica Acta. 162(1). 65–70. 4 indexed citations
14.
Sakamoto, Masatomi, Minoru Takagi, Tomitaro ISHIMORI, & Hisashi O̅kawa. (1988). Copper(II)–Lanthanoid(III) Complexes of Binucleating Ligands Derived from 3-Formylsalicylic Acid and Diamines. Bulletin of the Chemical Society of Japan. 61(5). 1613–1618. 58 indexed citations
15.
O̅kawa, Hisashi, et al.. (1987). New Dinucleating Macrocycle, 12,24-Dihydroxy-1,6-dioxo-2,5,14,17-tetraaza[6·6]metacyclophane-13,17-diene and Its Metal Complexes. Chemistry Letters. 16(8). 1673–1674. 2 indexed citations
16.
O̅kawa, Hisashi, et al.. (1983). Synthesis and Characterization of a New Quinquedentate Ligand Consisting of Salen Skeleton and Phenolic Tail Capable of Axial Coordination and Its Metal Complexes. Bulletin of the Chemical Society of Japan. 56(11). 3268–3271. 11 indexed citations
17.
Mikuriya, Masahiro, Hisashi O̅kawa, & Sigeo Kida. (1980). Binuclear Metal Complexes. XXXIII. Synthesis, Structure, Spectra, and Magnetism of Binuclear Copper(II) Complexes with 2-[2-(Dialkylamino)ethylthio]ethanol. Bulletin of the Chemical Society of Japan. 53(10). 2871–2877. 23 indexed citations
18.
O̅kawa, Hisashi & Daryle H. Busch. (1979). Strong .pi.-antibonding effects on the electronic structures of complexes with charge-delocalized macrocyclic ligands. Inorganic Chemistry. 18(6). 1555–1558. 10 indexed citations
19.
Czernuszewicz, Roman S., Kazuo Nakamoto, Hisashi O̅kawa, & S. Kida. (1978). Resonance raman spectrum of dibromo [N,N′-bis-(salicylidene)propylenediaminatooxovanadium(V)] copper(I)·methanol. Inorganica Chimica Acta. 27. L101–L102. 4 indexed citations
20.
O̅kawa, Hisashi, et al.. (1974). A NOVEL HIGH-SPIN NICKEL(II)-COPPER(II) BINUCLEAR COMPLEX. Chemistry Letters. 3(9). 987–988. 19 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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