Crystal structures, phase transitions, and nuclear magnetic resonance of organic–inorganic hybrid [NH₂(CH₃)₂]₂ZnBr₄crystals

Abstract

Thermal ellipsoid plot (50% probability) for the [NH2(CH3)2]2 ZnBr4 structure at 300 K.

Exploring the Crystal Structure, Thermodynamics, and Molecular Dynamics of NH(CH3)3CuCl3·2H2O Organic–Inorganic Hybrid Perovskite

“…The change in intensities and delay times was described using the following equation: P ( t ) = P (0) exp(− t /T 1ρ ), where P ( t ) denotes the intensity of the spectrum at time t and P(0) denotes the intensity at time t = 0. 33 , 34 The intensity changes observed in the 1 H and 13 C NMR spectra with varying delay times were recorded at a given temperature. Specifically, the 1 H NMR spectrum at 300 K was plotted with a delay time ranging from 0.01 to 10 ms ( Figure 7 a), and the 13 C NMR spectrum at 300 K was plotted with a delay time ranging from 0.2 to 7 ms ( Figure 7 b).…”

Analysis of the Structure, Thermal, and Molecular Dynamics of Organic–Inorganic Hybrid Crystal at Phases IV, III, II, and I: [NH2(CH3)2]2CdBr4

“…Owing to the large change in 113 Cd chemical shifts, the coordination geometry of Br around Cd in CdBr 4 tetrahedra changes near T C1 . Therefore, it is known that Br plays an important role in the N–H···Br hydrogen bond. − Finally, 1 H T 1ρ and 13 C T 1ρ values, which represent the energy transfer around the 1 H and 13 C atoms of the cation, changed significantly with temperature, indicating that the T 1ρ values for 1 H and 13 C are governed by tumbling motions. The activation energies derived from the results of the NMR T 1ρ experiments for molecular motion were very high at high temperatures.…”

[(CH3)2NH2]2PdBr4, a layered hybrid halide perovskite semiconductor with improved optical and electrical properties

“…21) and [NH 2 (CH 3 ) 2 ] 2 ZnBr 4 . 22 As shown in Fig. 1(d), the inorganic layers connect the organic cations through intermolecular hydrogen bonds, with N-H/Br distances ranging from 3.341(9) to 3.489(9) Å and the bond angles ranging from 128 to 158°.…”