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糖太甜521鐵蟲 (初入文壇)
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| The optical properties of DMCS-TPA in solvents of varying polarities were investigated by UV-vis absorption and PL spec- troscopy. For comparison, the absorption and emission spectra of BMBCP in dilute solution are shown in Fig. 1. DMCS-TPA exhibits two prominent emission bands: one with a vibrational structure that remains located at around 430 nm and the other significantly shifts from 513 nm to 595 nm with the solvent changing from hexane to chloroform. The blue region emis- sions of DMCS-TPA, which are similar in different solvents, might originate from the DCS moiety because of their analo-gous spectra with those of BMBCP in the monomer state. The hypochromatic peaks of about 21 nm relative to those of BMBCP are attributed to the twisted molecular conformation and decreased conjugation induced by the steric hindrances. |
至尊木蟲 (知名作家)
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| 用紫外-可見吸收和PL光譜研究了在具有不同極性溶劑中DMCS-TPA的光學(xué)特性。為了進(jìn)行比較,BMBCP在稀溶液的吸收光譜和發(fā)射光譜見圖1。 DMCS-TPA具有兩個(gè)突出的發(fā)射帶:一個(gè)具有振動結(jié)構(gòu),保持位于430 nm周圍,另一個(gè)當(dāng)將溶劑從從己烷換為氯仿時(shí),其峰值從513納米顯著遷移至595nm處。DMCS-TPA的藍(lán)色發(fā)射區(qū)在不同的溶劑中是相似的,可能源于DCS的結(jié)構(gòu)基團(tuán),因?yàn)樵趩误w狀態(tài)下,它們的光譜與BMBCP類似。相對于BMBCP,其低色度峰約為21 nm,是由于其扭曲的分子構(gòu)象和因立體阻礙引起的低偶聯(lián)。 |
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