Synthesis, structures and spectroscopic properties of new 1,2-bis[2-(4-methyl-7-acetylamino-1,8-naphthyridine)]ethylene ligand and its binuclear copper(I) complexes

doi:10.1016/j.ica.2011.09.014

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	Synthesis, structures and spectroscopic properties of new 1,2-bis[2-(4-methyl-7-acetylamino-1,8-naphthyridine)]ethylene ligand and its binuclear copper(I) complexes
	Li Zhan-Xian 3; Li Cong 1; Mu Wei-Hua 1; Xiong Shao-Xiang 2; Fu Wen-Fu 1,3
刊名	INORGANICA CHIMICA ACTA
	2011-12-15
卷号	379 期号:1 页码:7-15
关键词	Vinyl Binuclear Copper(i) Crystal Structures Spectroscopic Properties 1 8-naphthyridine Derivatives
ISSN号	0020-1693
DOI	10.1016/j.ica.2011.09.014
英文摘要	The synthesis, characterization, spectroscopic properties of a new ligand 1,2-bis[2-(4-methyl-7-acetyl-amino-1,8-naphthyridine)]ethylene (L) and its two binuclear Cu(I) complexes containing triphenylphosphine (PPh3) or bis(diphenylphosphino)methane (dppm), [Cu-2(L)(PPh3)(4)](BF4)(2)center dot 2CH(2)Cl(2) (1 center dot 2CH(2)Cl(2)) and [Cu-2(L)(dppm)(2)](BF4)(2)center dot 4H(2)O (2 center dot 4H(2)O) are reported. The structural investigation of these compounds based on X-ray crystal analysis shows that the copper(I) centers adopt different coordination geometries, O(N)CuP2+ and NCuP2+ for complexes 1 and 2, respectively. Upon irradiation of a degassed organic solution of L at 365 nm, photoinduced isomerization reaction and an intramolecular proton transfer of ligand L were detailed studied by absorption spectral changes. A spectroscopic investigation involving time-dependent density functional theory calculations allows assignment of the excited states that relate to emission and transient absorption spectra. The observed lower-energy absorption bands appearing in the region of 413 and 418 nm for 1 and 2 in dichloromethane are assigned to ligand-to-ligand charge transfer (LLCT, phosphine -> napy) transition in nature. Compared with well-structured solid-state emission originating from pi pi* transition of ligand L, complexes 1 and 2 exhibit intense room-temperature solid-state emissions with lambda(max) at 586 and 620 nm, respectively. The energy and the shape of the emission bands are clearly different from that of the ligand, indicating the emissions come from different excited states. (C) 2011 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000297266200002
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/72839]
专题	中国科学院化学研究所
通讯作者	Fu Wen-Fu
作者单位	1.Yunnan Normal Univ, Coll Chem & Chem Engn, Kunming 650092, Peoples R China 2.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing Mass Spectrometry Ctr, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Tech Inst Phys & Chem, HKU CAS Joint Lab New Mat, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li Zhan-Xian,Li Cong,Mu Wei-Hua,et al. Synthesis, structures and spectroscopic properties of new 1,2-bis[2-(4-methyl-7-acetylamino-1,8-naphthyridine)]ethylene ligand and its binuclear copper(I) complexes[J]. INORGANICA CHIMICA ACTA,2011,379(1):7-15.
APA	Li Zhan-Xian,Li Cong,Mu Wei-Hua,Xiong Shao-Xiang,&Fu Wen-Fu.(2011).Synthesis, structures and spectroscopic properties of new 1,2-bis[2-(4-methyl-7-acetylamino-1,8-naphthyridine)]ethylene ligand and its binuclear copper(I) complexes.INORGANICA CHIMICA ACTA,379(1),7-15.
MLA	Li Zhan-Xian,et al."Synthesis, structures and spectroscopic properties of new 1,2-bis[2-(4-methyl-7-acetylamino-1,8-naphthyridine)]ethylene ligand and its binuclear copper(I) complexes".INORGANICA CHIMICA ACTA 379.1(2011):7-15.