Hisashi Okamura

622 total citations
16 papers, 482 citations indexed

About

Hisashi Okamura is a scholar working on Organic Chemistry, Spectroscopy and Condensed Matter Physics. According to data from OpenAlex, Hisashi Okamura has authored 16 papers receiving a total of 482 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Organic Chemistry, 4 papers in Spectroscopy and 3 papers in Condensed Matter Physics. Recurrent topics in Hisashi Okamura's work include Chemical Synthesis and Reactions (5 papers), Sulfur-Based Synthesis Techniques (4 papers) and Supramolecular Chemistry and Complexes (4 papers). Hisashi Okamura is often cited by papers focused on Chemical Synthesis and Reactions (5 papers), Sulfur-Based Synthesis Techniques (4 papers) and Supramolecular Chemistry and Complexes (4 papers). Hisashi Okamura collaborates with scholars based in Japan. Hisashi Okamura's co-authors include Hisashi Takei, Morikazu Miura, Hideyuki Sugimura, Yasuhito Koyama, Yosuke Akae, Takayuki Arai, Toshikazu Takata, Yoko Abe, Toshikazu Takata and Satoshi Uchida and has published in prestigious journals such as Organic Letters, Tetrahedron Letters and Chemistry Letters.

In The Last Decade

Hisashi Okamura

16 papers receiving 465 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hisashi Okamura Japan 11 432 45 44 43 41 16 482
Kerstin Ibrom Germany 11 243 0.6× 93 2.1× 81 1.8× 60 1.4× 74 1.8× 24 503
Burkhard Knieriem Germany 11 304 0.7× 46 1.0× 82 1.9× 59 1.4× 46 1.1× 22 408
Zhengtao Li Singapore 12 366 0.8× 30 0.7× 187 4.3× 43 1.0× 43 1.0× 18 452
Suchismita Saha Germany 9 287 0.7× 46 1.0× 123 2.8× 105 2.4× 55 1.3× 19 366
I. V. KOVAL' Ukraine 12 339 0.8× 39 0.9× 43 1.0× 23 0.5× 64 1.6× 27 415
Arne Goos Germany 9 116 0.3× 166 3.7× 114 2.6× 12 0.3× 57 1.4× 10 385
I. E. Boldeskul Ukraine 6 166 0.4× 36 0.8× 18 0.4× 70 1.6× 17 0.4× 26 290
Detlef Kratz Germany 13 406 0.9× 47 1.0× 69 1.6× 25 0.6× 43 1.0× 16 463
Martina Ewald Switzerland 6 341 0.8× 148 3.3× 51 1.2× 70 1.6× 89 2.2× 6 447
Michael J. Tilby United Kingdom 11 487 1.1× 64 1.4× 40 0.9× 38 0.9× 65 1.6× 13 558

Countries citing papers authored by Hisashi Okamura

Since Specialization
Citations

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

Fields of papers citing papers by Hisashi Okamura

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hisashi Okamura

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

All Works

16 of 16 papers shown
1.
Abe, Yoko, Hisashi Okamura, Satoshi Uchida, & Toshikazu Takata. (2014). Synthesis of main chain-type liquid crystalline polyrotaxanes: influence of the wheel components and their mobility on liquid crystalline properties. Polymer Journal. 46(9). 553–558. 5 indexed citations
2.
Akae, Yosuke, Hisashi Okamura, Yasuhito Koyama, Takayuki Arai, & Toshikazu Takata. (2012). Selective Synthesis of a [3]Rotaxane Consisting of Size-Complementary Components and Its Stepwise Deslippage. Organic Letters. 14(9). 2226–2229. 48 indexed citations
3.
Abe, Yoko, Hisashi Okamura, Kazuko Nakazono, et al.. (2012). Thermoresponsive Shuttling of Rotaxane Containing Trichloroacetate Ion. Organic Letters. 14(16). 4122–4125. 47 indexed citations
4.
Akae, Yosuke, Takayuki Arai, Yasuhito Koyama, et al.. (2012). One-pot Synthesis of Permethylated α-CD-based Rotaxanes Having Alkylene Chain Axles and Their Structural Characteristics. Chemistry Letters. 41(8). 806–808. 22 indexed citations
5.
Suematsu, Hisayuki, et al.. (2000). A possible cause of the peak effect in Y–Ba–Cu–O melt-grown bulks: modulation in oxygen distribution. Physica C Superconductivity. 338(1-2). 96–102. 8 indexed citations
6.
Suematsu, Hisayuki, Hisashi Okamura, S. Nagaya, & H. Yamauchi. (1999). Role of the twin boundary for the occurrence of peak effect in Y-Ba-Cu-O superconducting bulks melt grown under varied oxygen pressure. Superconductor Science and Technology. 12(5). 274–281. 19 indexed citations
7.
Okamura, Hisashi, S. Nagaya, Hisayuki Suematsu, & H. Yamauchi. (1997). Peak effect in Jc and sub-micron structures of Y-Ba-Cu-O superconducting bulks melt-grown under varying oxygen pressure. Applied Superconductivity. 5(1-6). 107–117. 5 indexed citations
8.
Sugimura, Hideyuki, Hisashi Okamura, Morikazu Miura, Masahiko Yoshida, & Hisashi Takei. (1985). The coupling reaction of Grignard reagents with unsaturated sulfides catalyzed by nickel complexes.. NIPPON KAGAKU KAISHI. 416–424. 16 indexed citations
9.
Takei, Hisashi, Hideyuki Sugimura, Morikazu Miura, & Hisashi Okamura. (1980). HIGHLY STEREOSELECTIVE SYNTHESIS OF TRISUBSTITUTED OLEFINS FROM ALKENYL ARYL SULFOXIDES. Chemistry Letters. 9(10). 1209–1212. 14 indexed citations
10.
11.
Okamura, Hisashi, et al.. (1980). Cross-coupling of alkenyl, aryl or allylic selenides and grignard reagents catalyzed by nickel-phosphine complexes. Tetrahedron Letters. 21(1). 87–90. 61 indexed citations
12.
Okamura, Hisashi & Hisashi Takei. (1979). Cross-coupling of allylic sulfides and grignard reagents catalyzed by nickel-phosphine complex. Tetrahedron Letters. 20(36). 3425–3428. 36 indexed citations
13.
Takei, Hisashi, Morikazu Miura, Hideyuki Sugimura, & Hisashi Okamura. (1979). SYNTHESIS OF ALKYL- OR ARYL-SUBSTITUTED HETELOCYCLES: NICKEL COMPLEX CATALYZED COUPLING REACTION OF HETEROCYCLIC SULFIDES AND THIOLS WITH GRIGNARD REAGENTS. Chemistry Letters. 8(12). 1447–1450. 54 indexed citations
14.
Okamura, Hisashi, Morikazu Miura, & Hisashi Takei. (1979). Nickel-phosphine complex catalyzed coupling reaction of grignard reagents with alkenyl or aryl sulfides. Tetrahedron Letters. 20(1). 43–46. 119 indexed citations
15.
Okamura, Hisashi, et al.. (1978). 1-ARYLSULFINYL-1-ALKEN-1-YLLITHIUM. Chemistry Letters. 7(5). 517–520. 24 indexed citations
16.
Taguchi, Takeo, Hisashi Okamura, & Hisashi Takei. (1975). A NEW METHOD FOR THE SYNTHESIS OF 3-ALKYLFURAN AND 2,4-DIALKYLFURAN. Chemistry Letters. 4(8). 853–854. 3 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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2026