title: Luminescence Color Tuning by Regulating Electrostatic Interaction in Light-Emitting Devices and Two-Photon Excited Information Decryption.
abstract: It is well-known that the variation of noncovalent interactions of luminophores, such as π-π interaction, metal-to-metal interaction, and hydrogen-bonding interaction, can regulate their emission colors. Electrostatic interaction is also an important noncovalent interaction. However, very few examples of luminescence color tuning induced by electrostatic interaction were reported. Herein, a series of Zn(II)-bis(terpyridine) complexes (Zn-AcO, Zn-BF4, Zn-ClO4, and Zn-PF6) containing different anionic counterions were reported, which exhibit counterion-dependent emission colors from green-yellow to orange-red (549 to 622 nm) in CH2Cl2solution. More importantly, it was found that the excited states of these Zn(II) complexes can be regulated by changing the electrostatic interaction between Zn2+and counterions. On the basis of this controllable excited state, white light emission has been achieved by a single molecule, and a white light-emitting device has been fabricated. Moreover, a novel type of data decryption system with Zn-PF6as the optical recording medium has been developed by the two-photon excitation technique. Our results suggest that rationally controlled excited states of these Zn(II) complexes by regulating electrostatic interaction have promising applications in various optoelectronic fields, such as light-emitting devices, information recording, security protection, and so on.
authors.affiliation: Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT) , 9 Wenyuan Road, Nanjing 210023, Jiangsu, P. R. China.
authors.forename: Shujuan
authors.initials: S
authors.lastname: Liu
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT) , 9 Wenyuan Road, Nanjing 210023, Jiangsu, P. R. China.
authors.forename: Huiran
authors.initials: H
authors.lastname: Yang
authors.affiliation: Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Yi
authors.identifier: http://orcid.org/0000-0003-0694-1795
authors.initials: Y
authors.lastname: Zeng
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT) , 9 Wenyuan Road, Nanjing 210023, Jiangsu, P. R. China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: She
authors.affiliation: Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Nianyong
authors.initials: N
authors.lastname: Zhu
authors.affiliation: Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Cheuk-Lam
authors.initials: CL
authors.lastname: Ho
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT) , 9 Wenyuan Road, Nanjing 210023, Jiangsu, P. R. China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT) , 9 Wenyuan Road, Nanjing 210023, Jiangsu, P. R. China.
authors.forename: Wei
authors.identifier: http://orcid.org/0000-0001-7004-6408
authors.initials: W
authors.lastname: Huang
authors.affiliation: Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.|Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University , Hung Hom, Hong Kong, P. R. China.
authors.forename: Wai-Yeung
authors.identifier: http://orcid.org/0000-0002-9949-7525
authors.initials: WY
authors.lastname: Wong