Apr 25, 2024
5:00pm - 7:00pm
Flex Hall C, Level 2, Summit
Eugenia Vasileiadou1,Imra S. Tajuddin1,Michael C. De Siena1,Vladislav V. Klepov1,Mikaël Kepenekian2,George Volonakis2,Jacky Even2,Lukasz Wojtas3,Ioannis Spanopoulos3,Xiuquan Zhou1,Abishek Iyer1,Julie L Fenton4,William Dichtel1,Mercouri Kanatzidis1
Northwestern University1,Univ. Rennes2,University of South Florida3,The Pennsylvania State University4
Eugenia Vasileiadou1,Imra S. Tajuddin1,Michael C. De Siena1,Vladislav V. Klepov1,Mikaël Kepenekian2,George Volonakis2,Jacky Even2,Lukasz Wojtas3,Ioannis Spanopoulos3,Xiuquan Zhou1,Abishek Iyer1,Julie L Fenton4,William Dichtel1,Mercouri Kanatzidis1
Northwestern University1,Univ. Rennes2,University of South Florida3,The Pennsylvania State University4
The limitations of three-dimensional (3D) perovskites are related to their narrow structural tunability of the organic cations and their moisture sensitivity. Herein, we report a new family of 3D cubic hybrid metal halides (T-Et
6)
3Pb
11X
31 (X = I, Br), where T is 1,3,5-tris-(4-aminophenyl)benzene. The materials are synthesized through an
in situ N-alkylation of T and an efficient one-step solvothermal reaction containing ethanol, initiating a tunable synthetic avenue for the acquisition of structurally complex hybrid halides with luminophores. (T-Et
6)
3Pb
11X
31 consist of an unprecedented
Ia3 framework of [Pb
11X
31]
9– one-dimensional (1D) chains embedded with (T-Et
6)
3+ cations, affording an overall 3D topology. The constituent [Pb
11X
31]
9– chains include exclusively octahedral lead halide units with clusters of face- and edge-sharing connectivity, giving rise to weak broad emission centered at ∼660 nm observed at 78 K. (T-Et
6)
3Pb
11I
31 demonstrates water stability for at least 7 days. Synthesis through ambient pressure results in tunable structural variations of zero-dimensional (0D) structures rendering T
7Pb
3Br
27DMF and T
2Sn
3Br
184H
2O0.5Br
2, both of which feature blue PL emission at room temperature.