Two-photon fluorescent polysiloxane-based films with thermally responsive self switching properties achieved by a unique reversible spirocyclization mechanism

Abstract

The first example of a two-photon fluorescent polysiloxane-based film with fantastic thermal-responsive properties was reported. A unique alkaline tuned reversible spirocyclization mechanism was proposed.

Lysosome‐Targeting Polysiloxane Fluorescent Probe for Continuous Detection of Fe3+, Cu2+, and H2O2

“…The blue fluorescence of P1 is attributed to the presence of coordination bonds of O → Si and the aggregation of lone pairs of oxygen atoms. [42][43][44][45] As shown in Scheme 2, unique structure of P1 and different physical and chemical properties of Cu 2+ and Fe 3+ endow the probe P1 the ability to recognize ions through coordination. N and O atoms could transfer their lone electron pairs to the unoccupied orbits of ions [42,[46][47][48][49][50][51] to form seven-membered ring complexes.…”

Thermally Responsive Materials for Bioimaging

“…Very recently,o ur group designed and synthesized the first example of at hermal responsive luminescent material with uniquet wo-photon fluorescence ( Figure 5a nd Figure 6). [27] The luminescence of the polysiloxane filmc ould be turned on or off by heatingo rc ooling and their surfacec ould serve as an adhesive site for HeLa cells. The thermal-responsive polysiloxane films can promisingly act as an ew type of functional luminescent materials in bioscience or materials.…”

“…Very recently, our group designed and synthesized the first example of a thermal responsive luminescent material with unique two‐photon fluorescence (Figure and Figure ) . The luminescence of the polysiloxane film could be turned on or off by heating or cooling and their surface could serve as an adhesive site for HeLa cells.…”

Silica Nanoparticles with Up-conversion Fluorescence Based on Triplet–Triplet Annihilation Mechanism for Specific Recognition of Apoptosis Cells

“…Characterization and Measurements. Nuclear magnetic resonance ( 1 H NMR, 13 C NMR) spectra were recorded on a Bruker AVANCE 400 spectrometer using CDCl 3 as the solvent and with tetramethylsilane as an interior label. Scanning electronic microscopy (SEM) images were obtained using Hitachi S-4800.…”

“…Furthermore, these nanocrystals were used to prove the viability of lifetime encoding . In our previous work, a number of two-photon absorptive molecules or materials have been designed. − The most characteristic property of the UC luminescent materials is the wavelength conversion ability that can convert short wavelength excitations into long wavelength emissions. Therefore, UC materials produce negligible autofluorescence and meanwhile provide low noise, which make them suitable for bioimaging …”