基于吡啶基苯甲酸盐的两个银(Ⅰ)配合物的合成、晶体结构及荧光性质（英文）

Syntheses, Crystal Structures and Fluorescence Properties of Two Silver(Ⅰ) Complexes Derived from Pyridylbenzoate Ligands

合成了2个含有吡啶基苯甲酸盐的银(Ⅰ)配合物,即[Ag_2(PPh_3)_2(4,4-pybz)_2(H_2O)_2]_n(1)和[Ag_2(PPh_3)_2(4,3-pybz)_2]·2CH_3OH(2)(PPh_3=三苯基膦,4,4-pybz=4-吡啶-4-基-苯甲酸根,4,3-pybz=4-吡啶-3-基-苯甲酸根),并通过红外光谱、元素分析和荧光光谱进行分析和表征,它们的结构由X射线单晶衍射测定。在不同的溶剂下,2个配合物由AgBF_4、PPh_3和不同的吡啶苯甲酸在氨水作用下,以1∶1∶1的比例反应而成。在配合物1中,所有的银原子由吡啶基苯甲酸桥连形成一维链状结构。在配合物2中,2个银原子通过2个4-吡啶-3-基-苯甲酸根配体形成双核结构。在荧光光谱中,在发射状态下所有的峰均来源于配体的π-π*跃迁。

Two silver （Ⅰ） complexes with pyridylbenzoate ligands, namely [Ag2（PPh3）2（4,4-pybz）2（H2O）2]n（1）, [Ag2 （PPh3）2（4,3-pybz）2]· 2CH3OH（2） （PPh3=triphenylphosphine, 4,4-pybz=4-pyridin-4-yl-benzoate, 4,3-pybz=4-pyridin-3- yl-benzoate） were synthesized and characterized by IR, elemental analysis and fluorescence spectra, and their structures were elucidated by single-crystal X-ray diffraction. They have been made by reacting AgBF4, PPh3, different pyridylbenzoie acids in 1：1：1 molar ratio with ammonia water under different mixed solution conditions. In 1, the Ag atoms are bridged by pyridylbenzoate-eontaining ligand to form infinite chain structure. In 2, two Ag atoms are bridged by two 4-pyridin-3-yl-benzoate ligands to form binuelear complex. In fluorescence spectra, these emission peaks indicate that the origin of these emissions all involves emissive state derived from ligandcentered π-π transition.