Boronate assembles, derived from benzene-1,4-diboronic acid, showed room-temperature phosphorescence (RTP) in both solid-state and dispersions, being quite sensitive to the preparation conditions. Our chemometrics-assisted quantitative structure-property relationship (QSPR) analysis between...
An afterglow is beneficial as an emission signal in the field of displays and imaging probes. Here, boronic acidappended and spirolactam ring-containing rhodamine dye 1 was synthesized and grafted onto the surface of roomtemperature phosphorescence-active boronate nanoparticles (BPs), composed of polymeric 3-benzo-2,4,8,10-tetraoxa-3,9diboraspiro[5.5]undecane. The resultant ensemble, 1@BP, exhibited a greenish afterglow. However, the addition of Al 3 + into the dispersion solution with 1@BP led to a change in the afterglow to grass green as a result of Förster-type energy transfer from the phosphorescent BP to the Al 3 + -interacting rhodamine dye 1 on the surface. Based on the ratio of the two emission intensities, a linear response in the concentration range of 3.8-15.2 μM was observed, with a detection limit of 4.2 μM for Al 3 + . A metal ion-dependent discernable color in afterglow was observed on a 1@BP-coated filter paper, which would be useful for not only film-based afterglow chemosensors but also encryption application.
Chemometrics-coupled chiral recognition was conducted with boronate ensembles containing D–π–A cyanostilbenes to determine and predict enantiomer excess for guest amines.
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