Takashi Yokoyama
Update March 11, 2025
List of publications, etc.
(1) E. Iwamoto, T. Yokoyama, S. Yamasaki, T. Yabe, T. Kumamaru, and Y. Yamamoto,
“Axial Co-ordination and Ion-pair Formation for R,S,R,S-1,4,8,11-Tetramethyl-1,4,8,11-tetra-azacyclotetradecanenickel(II)
Perchlorate in Various Mixed Solvents with Nitrobenzene,” J. Chem. Soc., Dalton Trans., 1935 (1988).
(2) T. Yokoyama, E. Iwamoto and T. Kumamaru, “Dimerisation of Dimethyl Sulphoxide
in Dipolar Aprotic Solvents Using R,S,R,S-1,4,8,11-Tetramethyl-1,4,8,11-tetra-azacyclotetradecanenickel(II)
as a Probe,” J. Chem. Soc., Faraday
Trans., 86, 2937 (1990).
(3) T. Yokoyama, E. Iwamoto and T. Kumamaru, “Extraordinary Coordination of
Acetonitrile to Square-planar, 1,4,8,11-Tetraazacyclotetradecanenickel(II) and
(1R,4R,8S,11S)-1,4,8,11-Tetramethyl- 1,4,8,11-tetraazacyclotetradecanenickel(II) Cations,”
Bull. Chem. Soc. Jpn., 64, 464 (1991).
(4) E. Iwamoto, T. Yokoyama, J. Nishimoto, T. Yamashita, and T. Kumamaru,
“Reaction of 1,2-Dichloroethane with Pyridine Using the 1R,4S,8R,11S-Tetramethyl-1,4,8,11- tetraazacyclotetradecanenickel(II) Cation as a Probe”, Bull. Chem. Soc. Jpn.,
64, 523 (1991).
(5) T. Yokoyama, E. Iwamoto and T. Kumamaru, “Solvation and Ionic
Association of (1R,4S,8R,11S)- 1,4,8,11-Tetramethyl-1,4,8,11-tetraazacyclotetradecanenickel(II) Perchlorate
in Mixed Solvents of N,N- Dimethylformamide and N,N-Dimethylacetamide with
Nitrobenzene and 1,2-Dichloroethane,” Bull.
Chem. Soc. Jpn., 64, 1198 (1991).
(6) E. Iwamoto, J. Nishimoto, T. Yokoyama, K. Yamamoto, and T. Kumamaru, “Increased
Basicity and Hydrogen-bonding Donor Ability of Water by Hydrogen Bonding
to Dimethyl Sulphoxide and its Coordination to 1,4,8,11-Tetramethyl-1,4,8,11-tetraazacyclotetradecanenickel(II)
in Nitrobenzene,” J. Chem. Soc., Faraday
Trans., 87, 1537 (1991).
(7) T. Yokoyama, H. Ohnuma, K. Ohmura, and M. Zenki, “Indirect
Spectrophotometric Determination of the Sulfate Ion with 2-Aminoperimidine,” Bull. Hiruzen Res. Inst., Okayama Univ. of
Sci., 123 (1993).
(8) T. Yokoyama, T. Masuo, H. Akashi, and M. Zenki, “The Crystal Structures
of 2-Aminoperimidine,” Bull. Chem. Soc.
Jpn., 68, 1331 (1995).
(9) T. Yokoyama, N. Etoh and M. Zenki, “Crystal Structure of 2-(2-Pyridyl)-1,3-bis(2- pyridylmethyl)tetrahydropyrimidine,” Anal. Sci., 11, 875 (1995).
(10) T. Yokoyama, Y. Okuda, K.
Kohara, and M. Zenki, “Elution Delay of Fluoride by Chromatography of Anions on
Silica Gels Coated with Crown Ether Dyes,” J.
Chromatogr. A, 755, 34 (1996).
(11) T. Yokoyama, H. Kitagawa, H.
Iwasawa, and M. Zenki, “Coordination of Donor Solvent Molecules to Nickel
Square-planar Complexes,” Inorg. Chim.
Acta, 253, 1 (1996).
(12) T. Yokoyama, K. Kohara, H.
Akashi, and M. Zenki, “Crystal Structure of Arsenazo III,” Anal. Sci., 13, 165
(1997).
(13) T. Yokoyama, T. Watarai, T.
Uehara, K. Mizuoka, K. Kohara, M. Kido, and M. Zenki, “Flow Analysis
Preconcentration of Mg and Zn Using Emulsions for Flame Atomic Absorption
Spectrometry,” Fresenius' J. Anal. Chem.,
357, 860 (1997).
(14) T. Yokoyama, T. Akamatsu, K.
Ohji, and M. Zenki, “Capillary electrophoretic separation of several
transition-metal ions as their complexes with 1,10-phenanthroline derivatives
and its application to the determination of copper in duralmin alloys,” Anal. Chim. Acta, 364, 75 (1998).
(15) T. Yokoyama, K. Nakano and M. Zenki, “Specific separation of nickel ion
with bathophenanthrolinedisulfonic acid by capillary zone electrophoresis,”
Anal.
Chim. Acta, 396, 117 (1999).
(16) T. Yokoyama, K. Tashiro, T. Murao, A. Yanase, J. Nishimoto, and M. Zenki, “Determination of complex formation constants for Cu(II)-Alizarin complexone with amines by capillary zone electrophoresis,” Anal. Chim. Acta,
398, 75 (1999).
(17) T. Yokoyama, "Flow injection analysis using microsphere,"
J. Flow Injection Anal., 16, 265 (1999).
(18) M.
Zenki, Y. Nakakita, A. Komatsu, and T. Yokoyama, “Closed-loop flow-injection
analysis for the determination of a strong acid and base using an acetate
buffer solution and Methyl Orange,” Bunseki Kagaku, 49, 121 (2000).
(19) T. Yokoyama, H. Tsuji, and M. Zenki, "Capillary electrophoretic
determination of coordination equilibrium constants of carboxylate ions
with copper(II) complexed with several bis(1,10-phenanthroline) derivatives
and bis(bipyridine)," Anal. Chim. Acta, 409, 55 (2000).
(20) M. Zenki, A. Komatsu, and T. Yokoyama, “循環式フローインジェクション法による強酸の定量，”
J. Flow Injection Anal., 16, Supplement, 18 (2000).
(21) M. Zenki, M. Kurotsubo, and T. Yokoyama, “2,3-ジヒドロキシ安息香酸を用いるホウ素の蛍光検出フローインジェクション法，”
J. Flow Injection Anal., 16, Supplement, 32 (2000).
(22) M. Zenki, T. Sasaki, and T. Yokoyama, “ルモガリオン誘導体を用いたマンガン(II)の接触分析法，”
J. Flow Injection Anal., 16, Supplement, 133 (2000).
(23) T. Yokoyama, M. Macka and P. R. Haddad, "Determination of association
constants of inorganic ions with C12- and C14-alkyldimethylammoniopropane sulfonate zwitterionic surfactants using capillary electrochromatography," Anal. Chim. Acta, 442, 221 (2001).
(24) T. Yokoyama, M. Macka and P. R. Haddad, "Modification of the
electroosmotic flow and separation selectivity of anions in electrochromatography
with pseudo-stationary phases of C14-alkyldimethylammoniopropane sulfonate zwitterionic surfactants by addition of sallts to the background electrolyte,"Fresenius' J. Anal. Chem., 371, 502 (2001).
(25) T. Yokoyama, H. Tsuji, T. Kamada, and M. Zenki, "Capillary electrophoretic
separation between Fe(II) and Ni(II) precomplexed with 1,10-phenanthroline
in a high concentration buffer of n-butyric acid / n-butyrate and its application,"Anal. Bioanal. Chem., 372, 832 (2002).
(26) M. Zenki, Y. Iwadou and T. Yokoyama, "Flow-injection analysis
of copper(II) with PAR in the presence of EDTA,"Anal. Sci., 18, 1077 (2002).
(27) M. Zenki, T. Masutani and T. Yokoyama, "Repetitive determination
of calcium ion and regeneration of a chromogenic reagent using chlorophosphonazo
III and an ion exchanger in a circulatory flow injection system,"Anal. Sci., 18, 1137 (2002).
(28) M. Zenki, H. Itoh, S. Himeno, and T. Yokoyama, "Visual colorimetry
of iron(II)-1,10-phenanthroline after preconcentration onto polyurethane
foam,"Bunseki Kagaku, 52, 201 (2003).
(29) T. Yokoyama, G. Murakami, H. Akashi, and M. Zenki, "Crystal structure
of zwitterionic trimethylammoniopropane sulfonate,"Anal. Sci., 19, 805 (2003).
(30) T. Yokoyama, “キャピラリー電気クロマトグラフィーにおける無機イオンの分離選択性の向上に関する研究，”IC News Letter, (14), 2 (2003).
(31) M. Zenki, K. Minamisawa, and T. Yokoyama, "Repetitive determination
of copper(II) and regeneration of a chromogenic reagent using a cation-exchange
column in a circulatory flow-injection system,"Bunseki Kagaku, 52, 1131 (2003).
(32) T. Yokoyama, A. Yanase, K. Kanazawa, and M. Zenki, "Determination
and pre-concentration of copper(II) with N,N'-bis[2-(salicylideneamino)ethyl]ethane-1,2-diamine by flame atomic absorption
spectrophotometry,"Bull. Okayama Univ. of Sci., 39A, 41 (2003).
(33) T. Yokoyama, H. Tsuji, T. Akamatsu, and M. Zenki, "Relation between
electrophoretic behavior and molecular shapes of aromatic anions,"Anal. Sci., 20, 657 (2004).
(34) T. Yokoyama, G. Murakami, H. Akashi, and M. Zenki, "Crystal structure
of zwitterionic surfactant 3-(N,N-dimethylmyristylammonio)propane sulfonate," Anal. Sci., 20, x31 (2004).
(35) K. Minamisawa, T. Yokoyama, and M. Zenki, "Cyclic flow-injection
analysis for Fe(II)-1,10-phenanthroline using polyurethane foam," Bunseki Kagaku, 53, 1021 (2004).
(36) M. Zenki, A. Tanishita, and T. Yokoyama, "Repetitive determination
of ascorbic acid using iron(III)-1,10-phenanthroline-peroxodisulfate system
in a circulatory flow injection method," Talanta, 64, 1273 (2004).
(37) T. Yokoyama, M. Zenki, M. Macka, and P. R. Haddad, "Enhancement
of separation capability of inorganic ions by capillary electrochromatography," Bunseki Kagaku, 54, 107 (2005).
(38) T. Yokoyama, “トマト・花・指の表面の有機物をそのまま測れるって！，” Kagaku, 60, 65 (2005).
(39) M. Zenki, M. Ideshima, M. Taniguchi, A. Katoh, and T. Yokoyama, "Cyclic
flow-injection analysis for the repetitive determination of zinc with 2-(5-bromo-2-pyridylazo)-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol and EDTA," Anal. Sci., 21, 517 (2005).
(40) T. Yokoyama, H. Maekubo, A. Sakai, and M. Zenki, "Anion chromatography
using on-line recycled eluents," J. Chromatogr. A, 1089, 82 (2005).
(41) M. Zenki, K. Minamisawa, and T. Yokoyama, "Clean analytical methodology
for the determination of lead with Arsenazo III by cyclic flow-injection
analysis," Talanta, 68, 281 (2005).
(42) T. Yokoyama, E. Matsushita, S. Okamura, M. Shigemitsu, A. Itoh, S.
Higashimura, M. Inahara, and M. Zenki, "Capillary electrophoretic
behaviors of cobalt(II) and copper(II) with pyridinedicarboxylates and
2-pyridinecarboxylate by on-column complexation,"Bull. Okayama Univ. of Sci., 41A, 39 (2005).
(43) M. Zenki, S. Fujiwara, and T. Yokoyama, "Repetitive determination
of chemical oxygen demand by cyclic flow injection analysis using on-line
regeneration of consumed permanganate," Anal. Sci., 22, 77 (2006).
(44) T. Yokoyama, Y. Tsuchiya, G. Murakami, and M. Zenki, "Capillary
electrophoretic determination of self-dimerization constants of aromatic
carboxylate and sulfonate ions," Anal. Sci., 22, 807 (2006).
(45) T. Yokoyama, K. Ikemoto, T. Kihara, K. Teramura, K. Uryu, K. Shimizu,
M. Bitoh, K. Matsuzaki, and M. Zenki, "Influence of the coordination
of donor solvent molecules to 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecanenickel(II)
and analogous nickel(II) complexes on their steric factors," J. Solution Chem., 35, 639 (2006).
(46) T. Yokoyama, K. Murata, S. Mukai, K. Uomoto, T. Itoh, M. Shibata,
and M. Zenki, "Determination of aluminum in water sample by flame
AAS after extracting with 8-quinolinol complex - nitrobenzene," Bunseki Kagaku, 55, 757 (2006).
(47) T. Yokoyama, K. Matsumoto, S. Hyohdoh, and M. Zenki, "Reversed-phase
high-performance liquid chromatography for separation of carboxylates using
on-line recycled eluent and consecutive determinations of citrate in beverages,"Bull. Okayama Univ. of Sci., 43A, 27 (2007).
(48) T. Yokoyama, A. Sakai, and M. Zenki, "RP-LC with on-line recycled mobile phase for analysis of amino acids pre-derivatized wth o-phthalaldehyde,"Chromatographia, 67, 535 (2008).
(49) M. Zenki, M. Kojima, and T. Yokoyama, "Cyclic flow injection analysis
with spectrophotometric detection for assay of acidity in fruit juices
and soft drinks," J. Flow Injection Anal., 25, 69 (2008).
(50) M. Yumoto, S. Yamashita, T. Yokoyama, and M. Zenki, "Cyclic flow
injection analysis for heavy metal ions using xylenol orange," Bunseki Kagaku, 57, 673 (2008).
(51) M. Zenki, H. Katayama, and T. Yokoyama, "Determination of acidity
in fruit juices and soft drinks by cyclic flow injection analysis," Bunseki Kagaku, 57, 891 (2008).
(52) T. Yokoyama, M. Okano, M. Yoshise, M. Toda, H. Akashi, and M. Zenki, "Crystal structure of octahedral coordinated trinuclear Cu(II) complex 1,1,1-tris(N-salicylideneaminomethyl)ethane," X-ray Struct. Anal. Online, 26, 37 (2010).
(53) T. Yokoyama, M. Yoshise, S. Hase, A. Kawate, H. Akashi, and M. Zenki, "Crystal structure of isothiocyanato-N,N'-dimethyl-N,N'-bis(pyridine-2-ylmethyl)propane-1,3-diaminecopper(II) perchlorate," X-ray Struct. Anal. Online, 27, 51 (2011).
(54) T. Yokoyama, S. Hase, M. Yoshise, A. Shiomi, T. Shiba, H. Akashi,
and M. Zenki, "Crystal structure of isothiocyanato-N,N'-diethyl-N,N'-bis(pyridine-2-ylmethyl)propanediaminecopper(II) perchlorate," X-ray Struct. Anal. Online, 27, 65 (2011).
(55) T. Yokoyama, M. Yoshise, S. Hase, H. Akashi, and M. Zenki, "Crystal structure of catena-(µ2-perchlorato)-N-ethyl-N,N'-bis(pyridin-2-ylmethyl)propane-1,3-diaminecopper(II) perchlorate," X-ray Struct. Anal. Online, 28, 47 (2012).
(56) T. Yokoyama, T. Shiba, M. Yoshise, M. Toda, H. Akashi, and M. Zenki,
"Crystal structure of copper(II)-2-pyridinecarboxylic acid anhydride
complex," X-ray Struct. Anal. Online, 29, 27 (2013).
(57) T. Yokoyama, “クーロン爆発イメージングによる気相キラル分子絶対配置の直接決定，” Bunseki, 303 (2014).
(58) T. Yokoyama, Y. Shiraishi, K. Tada, W. Masuda, M. Sugiyama, A. Maekawa,
and M. Zenki, "Capillary zone electrophoretic separation of carbon
microparticles,"Bull. Okayama Univ. of Sci., 50A, 23 (2014).
(59) T. Yokoyama, “（株）林原 研究開発本部を訪ねて，” Bunseki, 397 (2015).
(60) 伊藤一明 監修，（公社）日本分析化学会2012年度IC分析士初段認証専門委員会・2014年度IC分析士二段認証専門委員会 編集，家氏，伊藤，伊藤，井上，大平，後藤，鈴木，関口，竹内，田中，長嶋，中田，中谷，野々村，早川，三浦，森，山本，横山，“第1回IC分析士初段試験★二段試験★★解説書，” （公社）日本分析化学会 (2015).
(61) H.Sakae, Y. Toda, T. Yokoyama, "Electrochemical behavior of ferritin
at the polarized water|1,2-dichloroethane interface,"Electrochem. Commun., 90, 83 (2018).
(62) T. Yokoyama, K. Kohara, S. Sasaki, F. Nagasaki, I. Tsuboi, S. Moriya,
M. Kubo, T. Iwata, K. Murakami, R. Shiozaki, K. Morishita, C. Dohmen, A.
Shinme, and M. Zenki, "Evaluation of barium sulfate-adsorbing molecular
sieve as solid membrane of sulfate ion-selective electrode for flow injection
analysis,"J. Flow Injection Anal., 36, 27 (2019).
(63) H.Sakae, K. Takasuga, T. Yokoyama, H. Nagatani, "Interfacial
association of ferritin with anionic fluorescent probe at the 1,2-dichloroethane/water
interface,"J. Electroanal. Chem., 888, 115175 (2021).
(64) T. Yokoyama, Y. Andoh, T. Kunisawa, K. Mineda, M. Inoue, K. Shimoda,
M. Yoshise, S. Hyohdoh, M. Yamamoto, T. Akai, K. Takano, H. Hashitani,
M. Hirawa, W. Masuda, N. Yoden, H. Sakae, and M. Zenki, "Selective
determination of formaldehyde by high-performance liquid chromatography
with porous graphitic carbon column using N,N'-bis(9-anthrylmethyl)propane-1,3-diamine as derivatizing reagent," Anal. Sci., 39, 285 (2023).
(65) T. Yokoyama, K. Kuzume, E. Fukuda, T. Shimizu, S. Kuroda, T. Imagawa,
Y. Ochi, D. Kawamoto, and H. Sakae, "Flow injection spectrophotometric
determination of chloride ion in glacial acetic and monochloroacetic acids
using o-nitroaniline with nitrite," J. Flow Injecion Anal., 40, 43 (2023).
(66) D. Kawamoto, H. Shigetomi, T. Yokoyama, "Mechanism of the solid-liquid
interfacial reaction between dissolved Cd speceies and the CaCO3 surface," Chemosphere, 376, 144294 (2025).