近红外发光材料和可见光-近红外光发光开关材料在光通信与光信息处理、环境检测、化学传感、分析质检、医疗军事等领域具有广阔的应用前景。本课题拟设计合成一系列具有较好平面性的Pt(II)配合物，通过对配合物分子空间堆积和分子间Pt-Pt相互作用的调控来系统的研究配合物的近红外发光及可见光-近红外光发光开关性质。系统的研究近红外发光和开关行为的机理、过程及影响因素。全面考察配体共轭体系大小，配体取代基的位置和空间位阻对配合物空间堆积结构和近红外发光性质的影响；通过改变取代基供(吸)电子性能对配合物近红外发光进行调控；利用蒸气吸附等外界刺激来研究配合物可见光-近红外光发光开关行为。深入探索这类开关材料的结构、性能、灵敏度、选择性等因素之间的规律，为近红外发光材料和可见光-近红外光发光开关材料的发展提供一定的理论支持。希望能够得到一些具有现实应用价值的近红外发光和可见光-近红外光发光开关材料。

Near infrared(NIR) Luminescent materials and Vis-NIR luminescent switch materials are widely used in many fileds such as optical communication and optical information processing, environment monitoring, chemical sensoring, analysis of quality inspection, medical and military. For this reason,the purpose of this project is to design and synthesize a series of planar Pt(II) complexes, and explor their NIR luminescent and Vis-NIR luminescent switch properties through the regulation of molecular stacking and intermolecular Pt-Pt interactions. The mechanism, process and effect factors of NIR luminescent and switch behaviors will be systematic studied. The effects of the conjugated system size of ligands,position and steric of substituent groups on NIR property of the complexes will be comprehensive studied, including the adjustment of NIR luminescence by introducing substituent groups with diffferent electron donating and withdrawing ability, and the controlling the Vis-NIR luminescence switching behavior by vapor adsorption and other external stimuli. The relationship between the molecular structure, performance, sensitivity, selectivity and other factors of the materials will be investigated. The rules for the design and synthesis of the materials will be proposed. Finally, we hope to provide some NIR luminescent and Vis-NIR luminescent switch materials with practical application value.