【作者】 张晓昕；

【导师】 张建军； 倪钧；

【作者基本信息】 大连理工大学 ， 无机化学， 2017， 硕士

【摘要】 近红外光(NIR)的定义是指介于可见光(ⅥS)和中红外光(MIR)之间的电磁波,按照美国试验和材料检测协会的定义是指波长范围在780~2526纳米内的电磁波。由于近红外光具有穿透能力强,对生物体没有损害等特点,使其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。本课题利用4,4’-二氯-2,2’-联吡啶为主要配体,一系列苯乙炔类物质作为辅助配体,设计合成了一系列具有较好平面性的Pt(II)-炔配合物。我们运用1H-NMR、IR、荧光光谱、紫外-可见吸收光谱、XRD、X-射线单晶衍射等手段对配合物的组成、结构和光物理性质进行了测定,并对这些配合物的发光变色性质及长波长近红外发光性质进行了系统的研究。发现这些配合物中除了6和8以外,其他的配合物均具有发光变色性质。配合物1、2、5、11和12具有长波长近红外发光性质,在固体状态下它们的近红外发射波长均超过了950纳米。研究表明,当配合物具有一维铂链堆积结构时,由于分子间强烈的金属-金属相互作用,使得配合物的3MMLCT激发态的能量大幅降低,从而导致配合物的发光能量减弱到长波长近红外区域。而配合物的平面性,取代基的供吸电子性,取代基的位置和刺激信号均影响着配合物的一维铂链堆积和长波长近红外发光性质。更多还原

【Abstract】 The definition of near-infrared light(NIR)refers to electromagnetic waves between visible light(VIS)and mid-infrared light(MIR).Near-infrared refers to the electromagnetic spectrum in the range of 700-2526 nm according to the American Society for Testing and Materials(ASTM).Due to its versatile advantages such as strong penetrating ability,biological safety,NIR has found wide applications in many fields including optical communication and optical information processing,environmental testing,chemical sensing,analytical quality inspection,medical military and other fields.A series of square-planar platinum(II)complex,based on 4,4-dichloro-2,2′-bipyridine and a series of phenylethylene with different substituents ligands,were developed and characterized.The composition,structure and photophysical properties of the complexes were measured by 1H-NMR,IR,fluorescence spectroscopy,UV-Vis absorption spectroscopy,XRD,X-ray single crystal diffraction and so on.And their luminescence switching property and long-wavelength NIR luminescence were systematically studied.The results reveal that all of the complexes except for 6 and 8 have luminescence switching property and the complexes 1,2,5,11 and 12 exhibit long-wavelength NIR luminescence with their emission wavelength beyond 950 nm in the solid-state.The results show that once the complex stacks in the 1-D “platinum wire” structure with strong Pt-Pt interactions,the energy of 3MMLCT excited state could be reduced greatly,leading to the long wavelength NIR luminescence of the complex.And square-planar,electron-donating and electron-withdrawing substituents,substituent position and stimulus play the key roles in the formation of the 1-D “platinum wire” stacking structure and long-wavelength near-infrared luminescence properties of the complex.更多还原