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基于给体-受体二芳基乙烯的高响应光致变色薄膜及其在全息术中的应用。

High response photochromic films based on D-A diarylethenes and their application in holography.

作者信息

Mantero Maria Chiara, Oggioni Luca, Pariani Giorgio, Ortica Fausto, Tosi Silvano, Canepa Maurizio, Bertarelli Chiara, Tommasini Matteo, Bianco Andrea

机构信息

INAF - Osservatorio Astronomico di Brera Via Bianchi 46 23807 Merate Italy

Dipartimento di Chimica, Biologia e Biotecnologie, Università Degli Studi di Perugia Via Elce di Sotto 8 Perugia 06123 Italy.

出版信息

RSC Adv. 2020 Jul 13;10(44):26177-26187. doi: 10.1039/d0ra05535b. eCollection 2020 Jul 9.

DOI:10.1039/d0ra05535b
PMID:35519783
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9055363/
Abstract

A set of photochromic dithienylethenes bearing amino and nitro groups are synthesised and embedded at high concentrations in a polymer matrix (Cellulose Acetate Butyrate, CAB) to produce films showing a large reversible modulation of the complex refractive index in the Vis-NIR spectral range, thanks to an interesting combination of remarkable response at the molecular level and very high load capability in the chosen matrix. The photochromic derivatives are characterized in solution and in CAB films by means of electronic and vibrational spectroscopy, complemented by DFT calculations. Both the real and imaginary part of the refractive index are determined by spectroscopic ellipsometry. The modulation of the refractive index in the near infrared is in the range 0.02-0.04. These are very large values for such kinds of systems and they are due to a favourable combination of very large solubility of the derivatives in CAB and a high polarisability change. As for the change in transparency in the visible, contrast values larger than 10 are easily achieved. Based on such films, holograms are written and reconstructed with a very high fidelity and efficiency.

摘要

合成了一组带有氨基和硝基的光致变色二噻吩乙烯，并将其高浓度地嵌入聚合物基质（醋酸丁酸纤维素，CAB）中，以制备出在可见-近红外光谱范围内显示出复折射率有大的可逆调制的薄膜，这得益于分子水平上显著响应与所选基质中非常高负载能力的有趣结合。通过电子和振动光谱对光致变色衍生物在溶液中和CAB薄膜中的特性进行了表征，并辅以密度泛函理论计算。折射率的实部和虚部均由光谱椭偏仪测定。近红外区域的折射率调制范围为0.02 - 0.04。对于这类体系而言，这些是非常大的值，这归因于衍生物在CAB中非常大的溶解度与高极化率变化的有利组合。至于可见光区域的透明度变化，很容易实现大于10的对比度值。基于此类薄膜，全息图的写入和重建具有非常高的保真度和效率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/47cdc16a7bea/d0ra05535b-f13.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/75fbcc020a76/d0ra05535b-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/17db342625d9/d0ra05535b-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/6ba629074060/d0ra05535b-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/d65677a2652e/d0ra05535b-f12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/47cdc16a7bea/d0ra05535b-f13.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/d9bbb12065dd/d0ra05535b-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/c172ca31ed51/d0ra05535b-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/42b482c19fe1/d0ra05535b-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/06f49b40cb5c/d0ra05535b-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/a7b32356914c/d0ra05535b-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/79554abf2d70/d0ra05535b-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/076bb966e423/d0ra05535b-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/75fbcc020a76/d0ra05535b-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/17db342625d9/d0ra05535b-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/6ba629074060/d0ra05535b-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/d65677a2652e/d0ra05535b-f12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5347/9055363/47cdc16a7bea/d0ra05535b-f13.jpg

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