title: Switchable Nonlinear Optical and Tunable Luminescent Properties Triggered by Multiple Phase Transitions in a Perovskite-Like Compound.
abstract: A new perovskite-like inorganic-organic hybrid compound [Et3(n-Pr)P][Cd(dca)3] (1) (where [Et3(n-Pr)P]+is the propyltriethylphosphonium cation and dca is a dicyanamide ligand) was discovered to undergo three reversible phase transitions at 270 K (T1), 386 K (T2), and 415 K (T3), respectively. The variable-temperature single-crystal X-ray structural analyses reveal that these sequential phase transitions originate from the deformations of the [Cd(dca)3]-frameworks and the concomitant reorientations of the [Et3(n-Pr)P]+guest cations. It is found that 1 possesses a sensitive nonlinear optical (NLO) switching at T2with a large contrast of ∼40 within a narrow temperature range of ∼7 K. Furthermore, 1 shows intriguing photoluminescence (PL) property, and the PL intensity suffers a plunge near T3. The multiple phase transitions, switchable NLO and tunable luminescent properties simultaneously exist in this inorganic-organic perovskite-like hybrid compound, suggesting its great potential application in molecular switches and photoelectric field.
authors.affiliation: Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, People's Republic of China.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, People's Republic of China.
authors.forename: Xuan
authors.initials: X
authors.lastname: Zheng
authors.affiliation: Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, People's Republic of China.
authors.forename: Ping-Ping
authors.initials: PP
authors.lastname: Shi
authors.affiliation: Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, People's Republic of China.
authors.forename: Zainab
authors.initials: Z
authors.lastname: Zafar
authors.affiliation: Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, People's Republic of China.
authors.forename: Heng-Yun
authors.initials: HY
authors.lastname: Ye
authors.affiliation: Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, People's Republic of China.
authors.forename: Da-Wei
authors.initials: DW
authors.lastname: Fu
authors.affiliation: Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, People's Republic of China.
authors.forename: Qiong
authors.identifier: http://orcid.org/0000-0002-3532-5388
authors.initials: Q
authors.lastname: Ye