近红外发光镧系元素杂化纳米原纤化纤维素纳米纸作为紫外线滤光片。

Near-infrared emissive lanthanide hybridized nanofibrillated cellulose nanopaper as ultraviolet filter.

机构信息

Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.

Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China; Key Laboratory of Paper Based Functional Materials of China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China.

出版信息

Carbohydr Polym. 2018 Apr 15;186:176-183. doi: 10.1016/j.carbpol.2017.12.088. Epub 2018 Jan 2.

DOI:10.1016/j.carbpol.2017.12.088

PMID:29455976

Abstract

The lanthanide complexes [Yb(fac)(HO), Yb(tta)(HO), Nd(tta)(HO)] functionalized nanofibrillated cellulose (Ln-NFC) nanopapers with near-infrared (NIR) luminescence and high transparency are rapidly fabricated after solvent exchange using a simple suction filtration film-making method. The effects of NFC and lanthanide complexes content on their photophysical properties of Ln-NFC nanopapers and their mechanism of UV filters are fully investigated. With increasing lanthanide complexes content in the Ln-NFC nanopaper, their transmittances are gradually decreased while their NIR luminescences are obviously increased. Yb-fac NFC nanopaper has high UVB block rate at 298 nm, whereas the high UVA block ratio of Ln-tta NFC nanopaper is observed at 345 nm. Ln-NFC nanopapers show a much higher photostability without decomposition under UV irradiation at 365 nm over 5 h. The emission spectra of the Ln-NFC nanopaper process the NIR luminescence of the corresponding lanthanide ions through the efficient triplet-triplet energy transfer process. Ln-NFC nanopapers can bring a brilliant future for UV filters, labeling fields and marking soft materials application.

摘要

用简单的抽吸过滤成膜法进行溶剂交换后，可迅速制备出具有近红外（NIR）发光和高透明度的镧系配合物[Yb(fac)(HO), Yb(tta)(HO), Nd(tta)(HO)]功能化纳米原纤纤维素（Ln-NFC）纳米纸。研究了 NFC 和镧系配合物含量对 Ln-NFC 纳米纸光物理性质及其紫外线滤光剂机理的影响。随着 Ln-NFC 纳米纸中镧系配合物含量的增加，其透光率逐渐降低，而近红外发光明显增强。Yb-fac NFC 纳米纸在 298nm 处具有高的 UVB 阻断率，而 Ln-tta NFC 纳米纸在 345nm 处具有高的 UVA 阻断率。Ln-NFC 纳米纸在 365nm 下经 5 小时的紫外线照射后，在不分解的情况下具有更高的光稳定性。Ln-NFC 纳米纸通过有效的三重态-三重态能量转移过程，将相应镧系离子的近红外发光转化为发光。Ln-NFC 纳米纸可为紫外线滤光剂、标记领域和标记软材料应用带来光明的未来。