Growth and physiochemical characterization studies on 4-chloro-2-nitroaniline nonlinear optical single crystals

Broadband terahertz absorption and Q-switching behavior of 5-chloro-2-nitroaniline (5C2NA) crystals

“…Since this temperature is beyond 100 • C, there is no evidence for any entrapped water contained in the sample or any physically adsorbed water on the sample's surface [32]. This confirms the decomposition of the sample at 211 • C, which is in good agreement with the reports for the chloro nitro aniline derivatives [30,33]. The second and third endothermic peaks observed at 242 • C and 270 • C may be attributed to the degradation and volatilization of the compound.…”

“…Notably, the sharp bands at 1628 and 921 cm −1 in the IR spectrum correspond to the scissoring and rocking modes of N-H bending vibrations respectively. The band at 801 cm −1 was attributed to N-H out-of-plane bending vibrations [30]. In the range of 1300-1000 cm −1 and 900-667 cm −1 , in-plane and out-of-plane bending vibrations for C-H were observed, respectively [29].…”

“…5C2NA crystals exhibit emission peaks at 489 nm, 523 nm and 783 nm. The peak at 783 nm could be the result of intermolecular hydrogen bonding between the hydrogen of amino groups and the oxygen of groups of the nitro groups like N-H…O interaction [30]. The spectrum indicates that the material having blue as well as red emission can be utilized for optoelectronic applications [42].…”

“…In the current scenario, microelectronic industries seek materials with a low dielectric constant and compatibility with a high-frequency range to produce their devices. This preference is driven by the fact that such materials offer enhanced NLO and electronic properties, aligning with the industry's production objective [30,43,44]. Measurement was conducted with grown crystals after coating them with silver paste on both sides (which works as electrodes) in the frequency range of 40 Hz-8 MHz.…”