Aspartic acid assisted one-step synthesis of stable CsPbX3@Asp-Cs4PbX6 by in situ growth in NH2-MIL-53 for ratiometric fluorescence detection of 4-bromophenoxybenzene

Biomolecules incorporated in halide perovskite nanocrystals: synthesis, optical properties, and applications

“…102 Moreover, Fang et al used the bicarboxylic nature of Asp to form a core@shell structure of CsPb(BrI) 3 @Asp-Cs 4 Pb(BrI) 6 and employed it for biosensing. 82 The core@shell HPNC exhibited significantly improved ultraviolet, water, and thermal stabilities in comparison with CsPb(BrI) 3 , owing to the protection of the HPNC core from the environment. As discussed in section 2.5, despite their extremely low PLQY, PNA-M-MAPbBr 3 HPNCs were successfully used to sense adenine with a detection limit of 1.76 ppm.…”

“…Interestingly, Fang et al used the bicarboxylic nature of Asp to form a core@shell structure of CsPb(BrI) 3 @Asp-Cs 4 Pb(BrI) 6 . 82 CsPbX 3 @Cs 4 Pb(BrI) 6 core@shell NCs could not be formed using other AAs. Asp was the only AA studied that possesses two carboxyl groups, thus the formation of the core@shell material must be attributed to this property of the AA.…”

“…83,84 However, the use of bicarboxylate-containing AAs enabled the successful synthesis of core@shell HPNC materials, which do exhibit improved stability. 82 More studies need to be performed to elucidate the reasons why additional electron donating groups would be deleterious for luminescence and additional electron withdrawing groups are beneficial for HPNC luminescence. Presumably since both act to passivate defects on HPNC surfaces, it is unexpected that one type of passivation is more effective than the other.…”

A gel fluorescence sensor based on CDs@SiO2/FeS2@MIPs for the visual detection of p-chlorophenol

“…And it had been reported that the combination of MIT and ratiometric fluorescence detection can improve sensor selectivity, sensitivity and anti-interference capability. 30…”

“…And it had been reported that the combination of MIT and ratiometric uorescence detection can improve sensor selectivity, sensitivity and anti-interference capability. 30 In order to meet the requirements of on-site detection, a portable and on-site rapid detection sensor was attempted to be built for p-chlorophenol. At present, paper-based microanalytical devices are convenient and quick to use, inexpensive, biocompatible, and portable.…”