TY - JOUR
T1 - Irreversible Solvatochromic Zn-Nanopaper Based on Zn(II) Terpyridine Assembly and Oxidized Nanofibrillated Cellulose
AU - Zhang, Zhao
AU - Zhang, Meng
AU - Li, Xinping
AU - Li, Kecheng
AU - Lü, Xingqiang
AU - Wang, Yaoyu
AU - Zhu, Xunjin
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (21703131, 31370578), the Doctoral Scientific Research Foundation of Shaanxi University of Science & Technology (2016BJ-40), and the State Key Laboratory of Pulp and Paper Engineering (201821). X.Z. thanks the Interinstitutional Collaborative Research Scheme (RC-ICRS/15-16/02E, RC-ICRS/1617/02C-CHE) and the Interdisciplinary Research Matching Scheme (RC-IRMS/16/17/02CHEM) for support. The theoretical work described in this paper was supported by the High-Performance Cluster Computing Centre of Hong Kong Baptist University, which receives funding from the Research Grants Council, University Grants Committee of the HKSAR.
Funding Information:
This work was supported by the National Natural Science Foundation of China (21703131, 31370578), the Doctoral Scientific Research Foundation of Shaanxi University of Science & Technology (2016BJ-40), and the State Key Laboratory of Pulp and Paper Engineering (201821). X.Z. thanks the Interinstitutional Collaborative Research Scheme (RC-ICRS/15-16/02E, RC-ICRS/1617/02C-CHE) and the Interdisciplinary Research Matching Scheme (RC-IRMS/16/ 17/02CHEM) for support. The theoretical work described in this paper was supported by the High-Performance Cluster Computing Centre of Hong Kong Baptist University, which receives funding from the Research Grants Council, University Grants Committee of the HKSAR.
PY - 2018/9/4
Y1 - 2018/9/4
N2 - A new irreversible solvatochromic Zn-nanopaper has been produced through the coordination-driven assembly of Zn(II)-terpyridine complex (Zn-tpy) on the surface of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibril (tCNF). The Zn-tpy as a photoactive center exhibits a changed emission color from greenish-blue to yellow after coordination with the carboxylate anion on the surface of tCNF. Theoretic calculations support that the longer wavelength emission is the result of a metal-ligand charge transfer. When exposed to solvents and then dried, the coordination bond between the Zn-tpy and tCNF experienced a dynamic, reversible process, where the lowest-energy excited state emitted by the Zn-tpy was "inverted", which is a typical phenomenon of irreversible solvatochromism. The shifts of the emission colors of the Zn-nanopaper appeared result from its exposure to specific solvents and occurred in a matter of minutes. After solvent exposure, it was found that the emission colors of the nanopaper are not recovered to its original state. The different emissive Zn-nanopapers are easily prepared by post-processing using a solvatochromic process. This highly transparent Zn-nanopaper with post-processable emission offers unprecedented potential applications in the areas of memory devices, fluorescent switches, and organic light-emitting diodes (OLEDs).
AB - A new irreversible solvatochromic Zn-nanopaper has been produced through the coordination-driven assembly of Zn(II)-terpyridine complex (Zn-tpy) on the surface of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibril (tCNF). The Zn-tpy as a photoactive center exhibits a changed emission color from greenish-blue to yellow after coordination with the carboxylate anion on the surface of tCNF. Theoretic calculations support that the longer wavelength emission is the result of a metal-ligand charge transfer. When exposed to solvents and then dried, the coordination bond between the Zn-tpy and tCNF experienced a dynamic, reversible process, where the lowest-energy excited state emitted by the Zn-tpy was "inverted", which is a typical phenomenon of irreversible solvatochromism. The shifts of the emission colors of the Zn-nanopaper appeared result from its exposure to specific solvents and occurred in a matter of minutes. After solvent exposure, it was found that the emission colors of the nanopaper are not recovered to its original state. The different emissive Zn-nanopapers are easily prepared by post-processing using a solvatochromic process. This highly transparent Zn-nanopaper with post-processable emission offers unprecedented potential applications in the areas of memory devices, fluorescent switches, and organic light-emitting diodes (OLEDs).
KW - Coordination-triggered assembly
KW - Oxidized nanofibrillated cellulose
KW - Post-processing of fluorescence
KW - Transparent nanopaper
KW - Zn(II)-Terpyridine
UR - http://www.scopus.com/inward/record.url?scp=85050206863&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.8b01815
DO - 10.1021/acssuschemeng.8b01815
M3 - Journal article
AN - SCOPUS:85050206863
SN - 2168-0485
VL - 6
SP - 11614
EP - 11623
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 9
ER -
