Ken‐ichi Sakai

556 total citations
22 papers, 512 citations indexed

About

Ken‐ichi Sakai is a scholar working on Materials Chemistry, Physical and Theoretical Chemistry and Spectroscopy. According to data from OpenAlex, Ken‐ichi Sakai has authored 22 papers receiving a total of 512 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Materials Chemistry, 11 papers in Physical and Theoretical Chemistry and 8 papers in Spectroscopy. Recurrent topics in Ken‐ichi Sakai's work include Luminescence and Fluorescent Materials (11 papers), Photochemistry and Electron Transfer Studies (7 papers) and Molecular Sensors and Ion Detection (6 papers). Ken‐ichi Sakai is often cited by papers focused on Luminescence and Fluorescent Materials (11 papers), Photochemistry and Electron Transfer Studies (7 papers) and Molecular Sensors and Ion Detection (6 papers). Ken‐ichi Sakai collaborates with scholars based in Japan, United States and India. Ken‐ichi Sakai's co-authors include Tomoyuki Akutagawa, Takemitsu Kikuchi, Norihisa Hoshino, Takashi Takeda, Shu Seki, Vikas S. Padalkar, Norimitsu Tohnai, Daisuke Sakamaki, Takayoshi Nakamura and Umpei Nagashima and has published in prestigious journals such as The Journal of Physical Chemistry B, The Journal of Physical Chemistry C and Physical Chemistry Chemical Physics.

In The Last Decade

Ken‐ichi Sakai

22 papers receiving 511 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ken‐ichi Sakai Japan 13 388 243 145 137 136 22 512
Cloé Azarias France 14 381 1.0× 261 1.1× 129 0.9× 169 1.2× 70 0.5× 23 542
Craig A. Sams United Kingdom 15 390 1.0× 145 0.6× 233 1.6× 137 1.0× 120 0.9× 21 594
Elodie Heyer France 13 311 0.8× 111 0.5× 125 0.9× 108 0.8× 122 0.9× 19 419
Tzu‐Chien Fang Taiwan 4 466 1.2× 402 1.7× 194 1.3× 278 2.0× 114 0.8× 11 694
Parthasarathy Gayathri India 15 426 1.1× 122 0.5× 113 0.8× 155 1.1× 279 2.1× 45 551
Alexander Aster Switzerland 11 240 0.6× 160 0.7× 133 0.9× 158 1.2× 66 0.5× 14 486
Ajith R. Mallia India 13 472 1.2× 186 0.8× 281 1.9× 195 1.4× 75 0.6× 14 675
James E. Yarnell United States 14 374 1.0× 123 0.5× 238 1.6× 151 1.1× 54 0.4× 20 563
Hsing‐Yang Tsai Taiwan 12 365 0.9× 152 0.6× 134 0.9× 154 1.1× 207 1.5× 25 529
Ming‐Jen Chang Taiwan 7 445 1.1× 375 1.5× 203 1.4× 280 2.0× 109 0.8× 17 705

Countries citing papers authored by Ken‐ichi Sakai

Since Specialization
Citations

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

Fields of papers citing papers by Ken‐ichi Sakai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ken‐ichi Sakai. 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 Ken‐ichi Sakai. The network helps show where Ken‐ichi Sakai may publish in the future.

Co-authorship network of co-authors of Ken‐ichi Sakai

This figure shows the co-authorship network connecting the top 25 collaborators of Ken‐ichi Sakai. A scholar is included among the top collaborators of Ken‐ichi Sakai 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 Ken‐ichi Sakai. Ken‐ichi Sakai 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.
Sakai, Ken‐ichi, et al.. (2024). Supramolecular Chirality Achieved by Assembly of Small π-Molecules of Octahydrobinaphtols with Axial Chirality. The Journal of Physical Chemistry B. 128(18). 4464–4471. 2 indexed citations
2.
Kubo, Kazuya, Kiyonori Takahashi, Ken‐ichi Sakai, et al.. (2021). Substituent Effect on Molecular Motions of m-Halogenated Anilinium/Dibenzo[18]crown-6 Supramolecular Cations in [Ni(dmit)2]− Crystals. Crystal Growth & Design. 21(4). 2340–2347. 3 indexed citations
3.
Sakai, Ken‐ichi, et al.. (2018). Color Changes of a Full‐Color Emissive ESIPT Fluorophore in Response to Recognition of Certain Acids and Their Conjugate Base Anions. Chemistry - A European Journal. 24(22). 5868–5875. 24 indexed citations
4.
Takeda, Takashi, et al.. (2018). ESIPT Fluorescent Chromism and Conformational Change of 3-(2-Benzothiazolyl)-4-hydroxy-benzenesulfonic acid by Amine Sorption. The Journal of Physical Chemistry C. 122(28). 16249–16255. 26 indexed citations
5.
Takeda, Takashi, et al.. (2017). Dual fluorescent zwitterionic organogels of a quinoxalinone derivative using cation–anion detection keys. Journal of Materials Chemistry C. 5(25). 6234–6242. 15 indexed citations
6.
Padalkar, Vikas S., Daisuke Sakamaki, Norimitsu Tohnai, et al.. (2017). AIE Active Carbazole-Benzothiazole Based ESIPT Motifs: Positional Isomers Directing the Optical and Electronic Properties. ChemistrySelect. 2(5). 1959–1966. 19 indexed citations
7.
Padalkar, Vikas S., Yusuke Tsutsui, Tsuneaki Sakurai, et al.. (2017). Optical and Structural Properties of ESIPT Inspired HBT–Fluorene Molecular Aggregates and Liquid Crystals. The Journal of Physical Chemistry B. 121(45). 10407–10416. 35 indexed citations
8.
Sakai, Ken‐ichi, et al.. (2016). An ESIPT fluorophore with a switchable intramolecular hydrogen bond for applications in solid-state fluorochromism and white light generation. Journal of Materials Chemistry C. 4(10). 2011–2016. 90 indexed citations
9.
Padalkar, Vikas S., Daisuke Sakamaki, Norimitsu Tohnai, et al.. (2016). AIE active triphenylamine–benzothiazole based motifs: ESIPT or ICT emission. RSC Advances. 6(32). 26941–26949. 40 indexed citations
10.
Sakai, Ken‐ichi, Norihisa Hoshino, Takashi Takeda, et al.. (2015). Crystal-to-crystal structural transformation of hydrogen-bonding molecular crystals of (imidazolium)(3-hydroxy-2-quinoxalinecarboxylate) through H2O adsorption–desorption. CrystEngComm. 17(31). 5962–5969. 12 indexed citations
11.
Padalkar, Vikas S., Daisuke Sakamaki, Norimitsu Tohnai, et al.. (2015). Highly emissive excited-state intramolecular proton transfer (ESIPT) inspired 2-(2′-hydroxy)benzothiazole–fluorene motifs: spectroscopic and photophysical properties investigation. RSC Advances. 5(98). 80283–80296. 32 indexed citations
12.
Takeda, Takashi, et al.. (2015). Cation–Anion Dual Sensing of a Fluorescent Quinoxalinone Derivative Using Lactam–Lactim Tautomerism. The Journal of Physical Chemistry A. 119(24). 6223–6231. 47 indexed citations
13.
14.
Sakai, Ken‐ichi, Ataru Kobayashi, Tomoyuki Akutagawa, et al.. (2010). Excited state intramolecular proton transfer (ESIPT) in six-coordinated zinc(ii)-quinoxaline complexes with ligand hydrogen bonds: their fluorescent properties sensitive to axial positions. Dalton Transactions. 39(8). 1989–1989. 69 indexed citations
15.
Sakai, Ken‐ichi, Tomoyuki Akutagawa, Tatsuo Hasegawa, & Takayoshi Nakamura. (2003). The d-L(π)-π type of charge-transfer salt [Cu(Me-tri)2][Ni(dmit)2]2: Interaction between copper(ii) d- and Ni(dmit)2π-electrons via π-conjugated macrocyclic ligands. Physical Chemistry Chemical Physics. 5(11). 2469–2475. 3 indexed citations
16.
Akutagawa, Tomoyuki, Tadafumi Uchimaru, Ken‐ichi Sakai, Tatsuo Hasegawa, & Takayoshi Nakamura. (2003). Bidentated Hydrogen Bond from [O−H···N−N···H−O] to [O-···+H−N−N−H+···-O] Structures in Solids. The Journal of Physical Chemistry B. 107(26). 6248–6251. 14 indexed citations
17.
Sakai, Ken‐ichi, Tomoyuki Akutagawa, Tatsuo Hasegawa, & Takayoshi Nakamura. (2001). Partially-oxidized Ni(dmit)2 salt with copper ions. Synthetic Metals. 120(1-3). 805–806. 5 indexed citations
18.
Iwahori, Fumiyasu, et al.. (1997). Physical properties of quasi-one-dimensional charge-transfer metal complexes;[M(HBQD)2]TCNQ (M=Ni, Pd; H2BQD=1,2-benzoquinonedioxime). Synthetic Metals. 86(1-3). 1803–1804. 4 indexed citations
19.
Sakai, Ken‐ichi, Hiroshi Kitagawa, Tadaoki Mitani, & Masahiro Yamashita. (1997). The Structural Change Caused by Temperature-Induced Metal-to-Ligand Charge Transfer in [Pd(HBQD)2]TCNQ(HBQD = 1,2-Benzoquinonedioxime). Chemistry Letters. 26(12). 1237–1238. 7 indexed citations
20.
Mitani, T., et al.. (1996). Electron-Proton Co-operation in l-D d-π Electronic State-Basic Study of Protono-Electronics-. Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals. 285(1). 249–256. 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Cloé Azarias Breakdown of academic impact, for papers by Craig A. Sams Breakdown of academic impact, for papers by Elodie Heyer Breakdown of academic impact, for papers by Tzu‐Chien Fang Breakdown of academic impact, for papers by Parthasarathy Gayathri Breakdown of academic impact, for papers by Alexander Aster Breakdown of academic impact, for papers by Ajith R. Mallia Breakdown of academic impact, for papers by James E. Yarnell Breakdown of academic impact, for papers by Hsing‐Yang Tsai Breakdown of academic impact, for papers by Ming‐Jen Chang
Rankless by CCL
2026