Abstract

Synthesis of a novel chlorocobaloxime with rhodol dye as an axial ligand which is linked to the cobalt metal through the base pyridine has been reported. X-ray quality single crystal of 3-(diethylamino)-9-(1,3-dihydro-1-oxoisobenzofuran-3-yl)-9H-xanthen-6-yl isonicotinate was obtained during the crystallization of this rhodol linked chlorocobaloxime. This compound crystallizes in the triclinic crystal system and the space group of P_1. Crystal packing diagram of this structure reveals a 3-D network due to extensive intermolecular hydrogen bonding. This rhodol linked pyridine base was further characterized by ¹H and ¹³C NMR. UV-vis absorption spectrum of this compound revealed an absorption peak in the visible region of 515.5 nm. This compound is 25 nm red shifted compared to the precursor rhodol chromophore. Upon excitation at 515 nm, this molecule reveals a strong fluorescence emission at 545 nm.

摘要

已经报道了以对羟基苯甲醚染料作为轴向配体的新型氯钴肟的合成，该轴向配体通过碱基吡啶与钴金属连接。在这种对羟基苯甲醚连接的氯钴肟的结晶过程中，获得了 X 射线质量的 3-(二乙氨基)-9-(1,3-二氢-1-氧代异苯并呋喃-3-基)-9H-xanthen-6-基异烟酸酯单晶。该化合物在三斜晶系和P ₁的空间群中结晶。由于广泛的分子间氢键，该结构的晶体堆积图显示出 3-D 网络。这种 rhodol 连接的吡啶碱进一步由¹ H 和^13表征C核磁共振。该化合物的紫外-可见吸收光谱显示在可见光区515.5nm处有一个吸收峰。与前体 rhodol 发色团相比，该化合物的红移为 25 nm。在 515 nm 处激发后，该分子在 545 nm 处显示出强烈的荧光发射。