环糊精增强金属卟啉/蒽衍生物上转换及其应用
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TQ314

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国家自然科学基金(批准号:51673143, 51303122)、江苏省高校优秀科技创新团队、江苏高校优势学科建设工程资助项目、江苏省普通高校研究生科研创新计划(项目编号:CXLX11-0970);国家自然科学基金项目(面上项目,重点项目,重大项目)


Study on the Cyclodextrin Enhanced Upconversion Based on Metalloporphyrins/Anthracene Derivatives
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Natural Science Foundation of China (51673143, 51303122), Excellent Innovation Team in Science and Technology of Education Department of Jiangsu Province, the Priority Academic Program Development of Education Department of Jiangsu Province (PAPD), the Innovation project of postgraduate scientific research (CXLX11-0970).;The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    摘要:弱光上转换是借助于三线态-三线态湮灭机制,通过吸收低能量(长波长)的光,尔后发射高能量(短波长)光的一种技术,通常是由发光剂与光敏剂复配构成二元体系来实现的。本文通过不同空腔半径的环糊精(-、-和-CD)包络发光剂(2-氯-9,10-二甲苯基蒽,DTACl),分别与光敏剂5,10,15,20-四苯基卟啉钯(PdTPP)和5,10,15,20-四苯基卟啉铂(PtTPP)构成三元体系,以期提高弱光上转换的效率。结果表明,具有适中空腔的-CD包络DTACl、与较长三线态寿命PdTPP构成的三元体系可明显提高上转换效率,原因是前者提高了发光剂的荧光量子产率、后者提高了分子间的三线态-三线态能量转移。用523 nm低功率(60 mW/cm2)半导体激光器激发上述三元体系,其上转换效率(UC)可达12.82%[这个效率在同类的研究中是什么水平?]。将获得的上转换荧光辐照Pt/WO3半导体粉末,可催化香豆素转化为7-羟基香豆素,表明弱光上转换在太阳能光催化合成方面具有潜在的应用价值。

    Abstract:

    Abstract:Low-powered up-conversion is a technique that low-energy light (long-wavelength) was absorbed by sensitizer and then high-energy light (short-wavelength) was emitted by the acceptor in the binary system, based on the triplet-triple annihilation mechanism. In order to enhance low-powered upconversion efficiency, a series of cyclodextrins (CD) such as -, - and -CD were firstly used to envelope the acceptor (2-chloro-9,10-xylene anthracene, DTACl) in the presence of sensitizer 5,10,15,20-tetraphenylporphyrin palladium (PdTPP) or 5,10,15,20-tetraphenylporphyrin platinum (PtTPP), which the ternary systems were formed. The results showed that -CD with appropriate cavity radius can effectively improve the fluorescence quantum efficiency (f) of DTACl and that sensitizer (PdTPP) with longer triplet lifetime is in favor of triplet-triplet energy transfer (TTT. As a result, the upconversion efficiency for ternary system (PdTPP/DTACl/-CD) was enhanced. Under the excitation of 523 nm diode laser (60 mW/cm2), bright green-to-blue upconversion was observed with the efficiency (UC) as high as 12.82%. With the help of Pt/WO3 photo-catalyst, the conversion from coumarin to 7-hydroxycoumarin was successfully achieved under the irradiation of our green-to-blue upconversion, indicating that low-powered up-conversion possesses potential application in the aspect of photocatalytic synthesis by solar energy.

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郝荣康,朱琳,于雪,章沫,王筱梅.环糊精增强金属卟啉/蒽衍生物上转换及其应用[J].精细化工,2018,35(7):

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  • 收稿日期:2017-02-27
  • 最后修改日期:2017-07-15
  • 录用日期:2017-11-06
  • 在线发布日期: 2018-06-11
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