Premium
Dendritic Fibrous Nanosilica Hybrid Materials with Near‐Infrared Emission as Multifunctional Sensors for Toxic Pollutants
Author(s) -
Chatterjee Sobhan,
Lou XinYue,
Wang Yan,
Liang Feng,
Yang YingWei
Publication year - 2021
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.202000220
Subject(s) - chemistry , fluorescence , infrared , adsorption , quenching (fluorescence) , nanotechnology , chemical engineering , materials science , optics , physics , engineering
Two dendritic fibrous nanosilica (DFNS)‐based hybrid materials (DFNS‐PDI‐NR and DFNS‐MDI‐NR) with superior near‐infrared (NIR) emission are developed. Based on the J‐aggregate of neutral red (NR) modified on the surfaces of DFNS, the hybrid materials possess a narrow redshifted emission band at 866 nm compared with the monomeric NR dyes upon excitation in the visible region (575 nm). Significantly, integrating the robust support of DFNS and unique fluorescence properties of the aggregated NR dyes, DFNS‐PDI‐NR and DFNS‐MDI‐NR can serve as a novel type of multifunctional solid‐state chemosensors for the detection of various toxic pollutants including transition‐metal anions (Cr 2 O 7 2− and MnO 4 − ), nitrophenols, and acetone with turn‐off NIR‐fluorescence signals. The quenching phenomena of DFNS‐PDI‐NR and DFNS‐MDI‐NR toward various toxic pollutants are established by nonlinear bend upward Stern–Volmer fitting. Moreover, these materials can be further used as sensitive probe materials for the determination of Cr 2 O 7 2− and MnO 4 − levels in various real water samples.