PMID- 18560661
OWN - NLM
STAT- MEDLINE
DCOM- 20081110
LR  - 20131121
IS  - 1477-9226 (Print)
IS  - 1477-9226 (Linking)
IP  - 25
DP  - 2008 Jul 7
TI  - Syntheses, structural characterization and photophysical properties of 
      4-(2-pyridyl)-1,2,3-triazole rhenium(I) complexes.
PG  - 3292-300
LID - 10.1039/b718538c [doi]
AB  - Novel chelators, i.e., 4-(2-pyridyl)-1,2,3-triazole derivatives, were synthesized 
      by means of Cu(I)-catalyzed 1,3-dipolar cycloaddition and used to prepare 
      luminescent Re(I) complexes [ReCl(CO)(3)(Bn-pyta)], [ReCl(CO)(3)(AcGlc-pyta)] and 
      [ReCl(CO)(3)(Glc-pyta)] (Bn-pyta = 1-benzyl-4-(2-pyridyl)-1,2,3-triazole, 
      AcGlc-pyta = 2-(4-(2-pyridyl)-1,2,3-triazol-1-yl)ethyl 
      2,3,4,6-tetra-O-acetyl-beta-d-glucopyranoside, Glc-pyta = 
      2-(4-(2-pyridyl)-1,2,3-triazol-1-yl)ethyl beta-d-glucopyranoside). X-Ray 
      crystallography of Bn-pyta and Glc-pyta indicated an azocompound-like structure 
      while the 1,2,4-triazole isomer has an azine character. [ReCl(CO)(3)(Bn-pyta)] 
      crystallized in the monoclinic system with space group P2(1)/n. Bn-pyta ligand 
      coordinates with the nitrogen atoms of the 2-pyridyl group and the 3-position of 
      1,2,3-triazole ring, which is a very similar coordinating fashion to that of the 
      2,2'-bipyridine derivative. The glucoconjugated Re(I) complexes 
      [ReCl(CO)(3)(AcGlc-pyta)] and [ReCl(CO)(3)(Glc-pyta)] hardly crystallized, and 
      were analyzed by applying extended X-ray absorption fine structure (EXAFS) 
      analysis. The EXAFS analyses suggested that the glucoconjugation at the 
      1-position of the 1,2,3-triazole makes no influence to the coordinating fashion 
      of 4-(2-pyridyl)-1,2,3-triazole. [ReCl(CO)(3)(Bn-pyta)] showed a blue-shifted 
      maximum absorption (333 nm, 3.97 x 10(3) M(-1) cm(-1)) compared with 
      [ReCl(CO)(3)(bpy)] (371 nm, 3.35 x 10(3) M(-1) cm(-1)). These absorptions were 
      clearly assigned to be the mixed metal-ligand-to-ligand charge transfer (MLLCT) 
      on the basis of time-dependent density functional theory calculation. The 
      luminescence spectrum of [ReCl(CO)(3)(Bn-pyta)] also showed this blue-shifted 
      feature when compared with that of [ReCl(CO)(3)(bpy)]. The luminescence lifetime 
      of [ReCl(CO)(3)(Bn-pyta)] was determined to be 8.90 mus in 
      2-methyltetrahydrofuran at 77 K, which is longer than that of [ReCl(CO)(3)(bpy)] 
      (3.17 micros). The blue-shifted electronic absorption and elongated luminescence 
      lifetime of [ReCl(CO)(3)(Bn-pyta)] suggested that 4-(2-pyridyl)-1,2,3-triazole 
      functions as an electron-rich bidentate chelator.
FAU - Obata, Makoto
AU  - Obata M
AD  - Graduate School of Humanities and Sciences, Nara Women's University, 
      Kitauoyanishimachi, Nara, 630-8506, Japan. mobata@cc.nara-wu.ac.jp
FAU - Kitamura, Asuka
AU  - Kitamura A
FAU - Mori, Akemi
AU  - Mori A
FAU - Kameyama, Chiaki
AU  - Kameyama C
FAU - Czaplewska, Justyna A
AU  - Czaplewska JA
FAU - Tanaka, Rika
AU  - Tanaka R
FAU - Kinoshita, Isamu
AU  - Kinoshita I
FAU - Kusumoto, Toshiyuki
AU  - Kusumoto T
FAU - Hashimoto, Hideki
AU  - Hashimoto H
FAU - Harada, Masafumi
AU  - Harada M
FAU - Mikata, Yuji
AU  - Mikata Y
FAU - Funabiki, Takuzo
AU  - Funabiki T
FAU - Yano, Shigenobu
AU  - Yano S
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080522
PL  - England
TA  - Dalton Trans
JT  - Dalton transactions (Cambridge, England : 2003)
JID - 101176026
RN  - 0 (Chelating Agents)
RN  - 0 (Ligands)
RN  - 0 (Organometallic Compounds)
RN  - 0 (Triazoles)
RN  - 551W113ZEP (2,2'-Dipyridyl)
RN  - 7440-15-5 (Rhenium)
RN  - 789U1901C5 (Copper)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - 2,2'-Dipyridyl/*chemistry
MH  - Catalysis
MH  - Chelating Agents/*chemical synthesis
MH  - Copper/chemistry
MH  - Crystallography, X-Ray
MH  - Cyclization
MH  - Ligands
MH  - Nitrogen/chemistry
MH  - Organometallic Compounds/*chemical synthesis
MH  - Photochemistry
MH  - Rhenium/*chemistry
MH  - Spectrum Analysis
MH  - Triazoles/*chemistry
EDAT- 2008/06/19 09:00
MHDA- 2008/11/11 09:00
CRDT- 2008/06/19 09:00
PHST- 2008/06/19 09:00 [pubmed]
PHST- 2008/11/11 09:00 [medline]
PHST- 2008/06/19 09:00 [entrez]
AID - 10.1039/b718538c [doi]
PST - ppublish
SO  - Dalton Trans. 2008 Jul 7;(25):3292-300. doi: 10.1039/b718538c. Epub 2008 May 22.