烷基鏈長對四苯基乙烯衍生物聚集行為和光學性質(zhì)的影響
[Abstract]:Tetraphenyl ethylene derivatives with different alkyl chain lengths were prepared and characterized by UV absorption spectra. The derivatives of tetraphenyl ethylene 1 (1-hexoxy phenyl) 2-tetra (4-hexoxy phenyl) ethylene (THPE) and tetraphenyl (4-n-decoxy phenyl) ethylene (TDPE), with different alkyl chain lengths were prepared. The photophysical properties of THPE and TDPE in tetrahydrofuran (THF) / H _ 2O mixed solvent were studied by fluorescence spectroscopy. The morphological structures of the aggregates formed in THF/H_2O by THPE and TDPE were observed by SEM. The results showed that the UV absorption spectra of THPE and TDPE in THF/H_2O both showed tail trailing phenomenon, but the water content in the solvent was different when the tail was started to appear. THPE and TDPE began to appear trailing phenomenon in THF/H_2O with water content of 50% and 40%, respectively. Both THPE and TDPE have the properties of agglomeration induced luminescent (AIE). Their fluorescence quantum yields increase with the increase of water content, but the starting point of the rapid growth of fluorescence quantum yields is different. The fluorescence quantum yields of THPE and TDPE began to increase rapidly after the water content reached 40% and 30%, respectively. THPE and TDPE can form regular aggregates in THF/H_2O. The difference is that THPE can form ordered nanorods only when the water content is 70 and TDPE can form nanorods and microns when the water content is 50. This indicates that TDPE with long alkyl chain is easier to aggregate, and by adjusting the length of alkyl chain, it is expected to produce AIE materials with high luminescence efficiency and controllable aggregate structure.
【作者單位】: 西安科技大學材料科學與工程學院;
【基金】:國家杰出青年科學基金(2120472) 陜西省自然科學基礎研究計劃(2016JQ5078)
【分類號】:O625.12
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