当前位置: X-MOL 学术J. Phys. Chem. C › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Multimodal Light-Harvesting Soft Hybrid Materials: Assisted Energy Transfer upon Thermally Reversible Gelation
The Journal of Physical Chemistry C ( IF 3.7 ) Pub Date : 2017-09-25 00:00:00 , DOI: 10.1021/acs.jpcc.7b06441
Carles Felip-León 1 , Fabrizio Guzzetta 1, 2 , Beatriz Julián-López 1, 2 , Francisco Galindo 1 , Juan F. Miravet 1
Affiliation  

Multimodal light-harvesting soft systems able to absorb UV-to-NIR radiations and convert into visible emissions have drawn much attention in the last years in order to explore new areas of application in energy, photonics, photocatalysis, sensors, and so forth. Here, we present a new hybrid system combining a supramolecular photonic gel of naphthalimide-derived molecules self-assembled into fibers and upconverting NaYF4:Yb/Tm nanoparticles (UCNPs). The hybrid system presented here manipulates light reversibly as a result of an optical communication between the UCNPs and the photoactive gel network. Upon UV irradiation, the system shows the characteristic emission at 410 nm from the photoactive organomolecule. This emission is also activated upon 980 nm excitation thanks to an efficient energy transfer from the UCNPs to the fibrillary network. Interestingly, the intensity of this emission is thermally regulated during the reversible assembly or disassembly of the organogelator molecules, in such a way that gelator emission is only observed in the aggregated state. Additionally, the adsorption of the UCNPs with the supramolecular gel fibers enhances their emissive properties, a behavior ascribed to the isolation from solvent quenchers and surface defects, as well as an increased IR light scattering promoted by the fibrillary network. The reported system constitutes a unique case of a thermally regulated, reversible, dual UV and IR light-harvesting hybrid soft material.

中文翻译:

多峰采光软杂化材料:热可逆凝胶化过程中的辅助能量转移

近年来,能够吸收紫外线至近红外辐射并转换为可见光的多峰集光软系统吸引了许多关注,以探索在能源,光子学,光催化,传感器等方面的新应用领域。在这里,我们提出了一个新的混合系统,该系统结合了萘二酰亚胺衍生分子的超分子光子凝胶,该分子自组装成纤维并上转换NaYF 4:Yb / Tm纳米粒子(UCNPs)。由于UCNP和光敏凝胶网络之间的光学通讯,此处介绍的混合系统可逆地操纵光。在紫外线照射下,系统显示出光敏有机分子在410 nm处的特征发射。由于从UCNPs到纤维网络的有效能量转移,这种发射也在980 nm激发时被激活。有趣的是,在有机胶凝剂分子的可逆组装或拆卸过程中,这种发射的强度受到热调节,使得仅在聚集状态下观察到胶凝剂的发射。此外,超分子凝胶纤维对UCNP的吸附增强了其发射性能,这种行为归因于与溶剂淬灭剂和表面缺陷的隔离,以及由原纤维网络促进的红外光散射增加。报告的系统构成了热调节,可逆,UV和IR双重采光混合软质材料的独特案例。
更新日期:2017-09-25
down
wechat
bug