5位芘取代的三芳基吡唑啉化合物的光物理行为

A Study on Photophysical Behavior of 1,3 diphenyl 5 (2) pyrenyl 2 pyrazoline 

合成了化合物 1 ,3 二苯基 5 ( 1 芘基 ) 2 吡唑啉 (DPPP) .由于 5位大取代基的存在 ,使整个分子不在同一平面 ,导致吡唑啉化合物光物理性质的改变 .DPPP光物理行为的研究表明 :即使在较低的浓度下 ( c=1 .0 8× 1 0 -5 mol·L-1) ,DPPP分子间也易生成电荷转移络合物 ;其荧光光谱表现出明显的溶剂极性效应、浓度效应和温度效应 ,不同的环境条件下可发射芘单体的荧光、分子内电荷转移络合物的荧光及分子间电荷转移络合物的荧光 .

In this work,the compound 1,3 diphenyl 5 (1 pyrenyl) 2 pyrazoline (DPPP) has been synthesized.A bulky 5 aryl substituent in this compound makes the molecule non coplanar and having significant changes in photophysics.The investigation of its photophysical properties indicated that intermolecular charge transfer complex between DPPP molecule forms, easily even if the concentration is very low (1.08×10 -5 mol·L -1 ).Its fluorescence spectrum shows distinct solvent,concentration and temperature effects.Under different experimental conditions,the fluorescence may emit from pyrenyl monomer,intramolecular charge transfer complex (Intra CT) and intermolecular charge transfer complex (Inter CT).