TY - JOUR
T1 - Simultaneous observation of low temperature 4f-4f and 3d-3d emission spectra in a series of Cr(III)(ox)Ln(III) assembly
AU - Subhan, Md Abdus
AU - Nakata, Hiroyasu
AU - Suzuki, Takayoshi
AU - Choi, Jong Ha
AU - Kaizaki, Sumio
N1 - Funding Information:
We gratefully acknowledge support of this research by a Grant-in-Aid for Scientific Research (No. 10304056) from the Ministry of Education, Science and Culture. Thanks are to Mr. Mitsuo Ohama, Department of Chemistry, Osaka University, for his cooperation during the variable temperature emission measurements.
PY - 2003/4
Y1 - 2003/4
N2 - We report here the low temperature emission spectra in the heterometal dinuclear 3d-4f assembled molecular system [(acac)2CrIII(μ-ox)LnIII(HBpz3) 2] (Cr(ox)Ln:acac- = acetylacetonate, ox2- = oxalate, HBpz3- = hydrotris(pyrazol-1-yl)borate; Ln = La, Nd, Ho, Er, Tm and Yb) in comparison with those of Na[Cr(acac)2(ox)] and [(HBpz3)2Ln(μ-ox)Ln(HBpz3)2](Ln = Nd and Er). From 10 to 150 K the Cr(ox)Ln complexes show a broad emission band around 800 nm from the 2E state of Cr(III) moiety. At room temperature no 2E-4A2 emission was observed in the Cr(ox)Ln except for the La and Lu complexes. On warming from 10 to 300 K rapid quenching of the 2E-4A2 emission of Cr(III) is suggested to result from the energy transfer from Cr to Ln in the Cr(ox)Ln. The excitation spectra and the life-time were also measured with monitoring the 4f-4f emission peaks of the Cr(ox)Yb complex.
AB - We report here the low temperature emission spectra in the heterometal dinuclear 3d-4f assembled molecular system [(acac)2CrIII(μ-ox)LnIII(HBpz3) 2] (Cr(ox)Ln:acac- = acetylacetonate, ox2- = oxalate, HBpz3- = hydrotris(pyrazol-1-yl)borate; Ln = La, Nd, Ho, Er, Tm and Yb) in comparison with those of Na[Cr(acac)2(ox)] and [(HBpz3)2Ln(μ-ox)Ln(HBpz3)2](Ln = Nd and Er). From 10 to 150 K the Cr(ox)Ln complexes show a broad emission band around 800 nm from the 2E state of Cr(III) moiety. At room temperature no 2E-4A2 emission was observed in the Cr(ox)Ln except for the La and Lu complexes. On warming from 10 to 300 K rapid quenching of the 2E-4A2 emission of Cr(III) is suggested to result from the energy transfer from Cr to Ln in the Cr(ox)Ln. The excitation spectra and the life-time were also measured with monitoring the 4f-4f emission peaks of the Cr(ox)Yb complex.
KW - 3d-3d emission
KW - 4f-4f emission
KW - Chromium(III)
KW - Heterometallic complex
KW - Lanthanide(III)
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U2 - 10.1016/S0022-2313(02)00573-2
DO - 10.1016/S0022-2313(02)00573-2
M3 - Article
AN - SCOPUS:0037376922
SN - 0022-2313
VL - 101
SP - 307
EP - 315
JO - Journal of Luminescence
JF - Journal of Luminescence
IS - 4
ER -