Effect of alkyl chain length on aggregation behaviors and photoelectric properties of organic luminophors

Abstract

Chemical changes of the molecular structure and regulation of aggregation state structure could affect/alter the chemical and physical properties of materials, which is an important means to develop novel high-efficiency organic photoelectric materials. Usually, the introduced outer edge alkyl chain of conjugate organic molecule was help to improve the solubility of materials, but recent studies have demonstrated that the length of alkyl chain had effects on the state aggregation behavior and photoelectric properties of conjugated organic small molecules, which indicated that the alkyl chain, called functional group, played a significant rule to regulate the photoelectric properties. In this paper, we reviewed the typical examples of the effect of alkyl chain length on the aggregation morphology of organic molecules and photoelectric properties based on the conjugated organic small molecules with properties of aggregation induced/enhanced fluorescence emission (AIE/AIEE). We aim to induce researchers to pay a close attention to the influence factor of alkyl chain when designing and synthesizing conjugated organic small molecules and studying the structure-property relationship of materials. The influence of alkyl chain will be considered as an important factor in the synthesis and controllable preparation of functionally oriented crystalline organic conjugated materials.