Hisashi O̅kawa

13.6k citations

362 papers · 12.3k indexed · 2 hit papers · h-index 51

Electronic, Optical and Magnetic Materials top 0.1%
Inorganic Chemistry top 0.05%
Materials Chemistry top 0.5%
Oncology top 0.2%
Organic Chemistry top 0.5%

Co-authors: Masaaki Ohba Sigeo Kida Naohide Matsumoto David E. Fenton Hideki Furutachi Hiroshi Sakiyama Masayuki Koikawa Hiroko Tamaki
Topics: Magnetism in coordination complexes (260 papers)Metal complexes synthesis and properties (256 papers)Lanthanide and Transition Metal Complexes (112 papers)
Cited by: Inorganic Chemistry Electronic, Optical and Magnetic Materials Oncology
Journals: Journal of the American Chemical Society Angewandte Chemie International Edition The Journal of Chemical Physics
Partner nations: Japan United Kingdom Canada

In The Last Decade

Hisashi O̅kawa

361 papers receiving 11.7k citations

Hit Papers

align trajectories

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.

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 Hiroko Tamaki, Zhuang Jin Zhong et al. Journal of the American Chemical Society profile →
Synthesis and magnetism of multi-dimensional cyanide-bridged bimetallic assemblies

2000 646 citations Masaaki Ohba, Hisashi O̅kawa profile →

Peers

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

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

#	Work	Indexed citations
1	Promotion of Low-Humidity Proton Conduction by Controlling Hydrophilicity in Layered Metal–Organic Frameworks 2012 ·Journal of the American Chemical Society ·Masaaki Sadakiyo,Hisashi O̅kawa,Akihito Shigematsu,Masaaki Ohba,Teppei Yamada,Hiroshi Kitagawa	306
2	One‐Dimensional 3d–3d–4f Trimetallic Assemblies Consisting of Cu^II₂Ln^III Trinuclear Complexes and Hexacyanometallate 2012 ·European Journal of Inorganic Chemistry ·Takuya Shiga,(unknown),Kunihisa Sugimoto,Hisashi O̅kawa,Hiroki Oshio,Masaaki Ohba	23
3	Characterization of a Fluoride-bridged Mixed-valent Tetrairon(II,II,III,III) Complex 2008 ·Chemistry Letters ·(unknown),Masaaki Ohba,Shinya Hayami,Yonezo Maeda,Makoto Tadokoro,Hisashi O̅kawa	4
4	μ-Hydroxo-μ-phenolato Dinuclear Zinc(II) and Nickel(II) Complexes Derived from Dinucleating Compartmental Ligands of “End-off” Type: Synthesis, Structures, and Properties 2005 ·Bulletin of the Chemical Society of Japan ·(unknown),(unknown),(unknown),Takuya Shiga,Masaaki Ohba,Takushi Yokoyama,Hisashi O̅kawa	19
5	A Porphyrin Nanotube: Size‐Selective Inclusion of Tetranuclear Molybdenum–Oxo Clusters 2004 ·Angewandte Chemie International Edition ·Ryosuke Harada,Yoshihisa Matsuda,Hisashi O̅kawa,Takahiko Kojima	74
6	Insertion of a strongly π–π stacked chloranilate pair into an M4 arrangement preorganized within a large macrocyclic ligand (M = Zn2+ and Cu2+)Electronic supplementary information (ESI) available: Fig S1: variable-temperature EPR spectra. See http://www.rsc.org/suppdata/cc/b2/b202529a/ 2002 ·Chemical Communications ·(unknown),(unknown),Eiji Asato,Masayuki Koikawa,Takuya Shiga,Masaaki Ohba,Hisashi O̅kawa	8
7	A Three-Dimensional Ferrimagnet with a High Magnetic Transition Temperature (TC) of 53 K Based on a Chiral Molecule 2001 ·Angewandte Chemie International Edition ·Katsuya Inoue,Hiroyuki Imai,Prasanna S. Ghalsasi,Kôichi Kikuchi,Masaaki Ohba,Hisashi O̅kawa,J. V. Yakhmi	257
8	A Rare .MU.3-.ETA.1,.ETA.2 Peroxo Bridge between Two CoIIIPbII Dinuclear Units and Hydrolytic Conversion into a Hydroxo-Bridged CoIIIPbII Complex. 1999 ·Chemistry Letters ·Hideki Furutachi,Shuhei Fujinami,Masatatsu Suzuki,Hisashi O̅kawa	1
9	[Mn(en)]3[Cr(CN)6]2⋅4 H2O: A Three-Dimensional Dimetallic Ferrimagnet (Tc=69 K) with a Defective Cubane Unit 1999 ·Angewandte Chemie International Edition ·Masaaki Ohba,Naoki Usuki,Nobuo Fukita,Hisashi O̅kawa	155
10	[Mn(en)]3[Cr(CN)6]2⋅4 H2O: A Three-Dimensional Dimetallic Ferrimagnet (Tc=69 K) with a Defective Cubane Unit 1999 ·Angewandte Chemie International Edition ·Masaaki Ohba,Naoki Usuki,Nobuo Fukita,Hisashi O̅kawa	1
11	B-N Bond Formation by the Reaction of (N-(3-Methoxysalicylidene)-N'-(imidazol-4-ylmethylene)-1,3-propanediamino)copper(II) Perchlorate and Sodium Tetraphenylborate 1995 ·Inorganic Chemistry ·(unknown),Naohide Matsumoto,Hisashi O̅kawa,Hitoshi Miyasaka,(unknown)	11
12	Zweidimensionale Netzwerkstruktur und metamagnetische Eigenschaften des 2:1‐Komplexes aus [Mn(3‐MeOsalen)(H₂O)]ClO₄ und K₃[Fe(CN)₆] 1995 ·Angewandte Chemie ·Hitoshi Miyasaka,Naohide Matsumoto,Hisashi O̅kawa,Emma Gallo,Carlo Floriani,Nazzareno Re	18
13	Ferromagnetic dihydroxo-bridged Cr(III)-Cu(II) and Cr(III)-Cu(II)-Cr(III) complexes, [Cr(tet b)(OH)2Cu(bpy)(CH3OH)](ClO4)3 and {Cu[Cr(tet b)(OH)2]2} (ClO4)4.cntdot.H2O (tet b = racemic 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane and bpy = 2,2'-bipyridine) 1991 ·Inorganic Chemistry ·Zhuang Jin Zhong,Naohide Matsumoto,Hisashi O̅kawa,Sigeo Kida	31
14	Synthesis and Magnetic Property of Imidazolate-Bridged Trinuclear Cu(II)–Fe(III)–Cu(II) Complexes. Effect of Fe(III) Spin-State Upon Spin-Coupling 1991 ·Chemistry Letters ·Naohide Matsumoto,Hiroko Tamaki,(unknown),Masayuki Koikawa,Yonezo Maeda,Hisashi O̅kawa,Sigeo Kida	8
15	Synthesis and properties of binuclear M(II)-Sn(IV)(CH3)2 (M=Cu, Co) complexes of N,N′-bis(3-carboxysalicylidene)ethylenediamine 1991 ·Inorganica Chimica Acta ·(unknown),Hisashi O̅kawa,(unknown),Sigeo Kida	4
16	Synthesis, Spectral and Magnetic Properties and Crystal Structures of Alkoxo-oxygen Coordinated Copper(II) Complexes of N,N′-Disubstituted Malonamide and Oxamide Derivatives 1984 ·Bulletin of the Chemical Society of Japan ·(unknown),Masahiro Mikuriya,Hisashi O̅kawa,Ichiro Murase,Sigeo Kida	18
17	Synthesis and Characterization of a New Quinquedentate Ligand Consisting of Salen Skeleton and Phenolic Tail Capable of Axial Coordination and Its Metal Complexes 1983 ·Bulletin of the Chemical Society of Japan ·(unknown),Hisashi O̅kawa,Sigeo Kida	11
18	Syntheses and Configurations of Copper(II) and Nickel(II) Complexes of trans-1,2-Dicyano-1,2-cyclohexanediamine 1982 ·Bulletin of the Chemical Society of Japan ·Hisashi O̅kawa,(unknown),Tatsuo Izumitani,Sigeo Kida	15
19	Synthesis and Characterization of Copper(II) and Nikel(II) Complexes of 1,5-Diamino-3-pentanol and Its Derivatives 1982 ·Bulletin of the Chemical Society of Japan ·Ichiro Murase,(unknown),Masahiko Tanaka,(unknown),Hisashi O̅kawa,Sigeo Kida	41
20	Synthesis and Magnetism of MIICuII3-type Tetranuclear Complexes, the Nickel(II) and the Cobalt(II) Complexes with N,N′-Bis(aminoalkyl)oxamidatocopper(II) 1980 ·Bulletin of the Chemical Society of Japan ·Hisashi O̅kawa,(unknown),Masahiro Mikuriya,Sigeo Kida	38

About Hisashi O̅kawa

Hisashi O̅kawa is a scholar working on Electronic, Optical and Magnetic Materials, Inorganic Chemistry and Oncology, having authored 362 papers that have together received 12.3k indexed citations. Recurring topics across this work include Magnetism in coordination complexes (260 papers), Metal complexes synthesis and properties (256 papers) and Lanthanide and Transition Metal Complexes (112 papers). The work is most often cited by research in Inorganic Chemistry (7.0k citations), Electronic, Optical and Magnetic Materials (8.5k citations) and Oncology (5.8k citations). Hisashi O̅kawa has collaborated with scholars based in Japan, United Kingdom and Canada. Frequent 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. Their work appears in journals such as Journal of the American Chemical Society, Angewandte Chemie International Edition and The Journal of Chemical Physics.

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.

Explore authors with similar magnitude of impact