Stimuli-responsive organic chromic materials with near-infrared emission

Fluorophore-Labeling Tetraphenylethene Dyes Ranging from Visible to Near-Infrared Region: AIE Behavior, Performance in Solid State, and Bioimaging in Living Cells

“…With the rapid development of visualization and imaging technology, functional fluorescent dyes are being increasingly used in material chemistry and biochemistry on the account of their marvelous applications in organic semiconductors, fluorescent probes, chemosensors, bioimaging, diseases diagnosis, therapy, etc. − To obtain fluorescent dyes with high performance, one of the biggest challenges is that the dyes need to overcome the effect of fluorescence weakening or quenching caused by molecular aggregation. − In contrast to the aggregation-caused fluorescence quenching, the aggregation-induced emission (AIE)-active fluorescent dyes can weaken the influence of molecular aggregation. Over past several years, a large number of AIE molecules with various functions have been developed and applied in the fluorescence-related fields. − For instance, their high performance in solid state or thin film can be used to construct the stimuli-responsive fluorescent sensors, while their excellent behavior in aqueous solution can serve as biomaterials to be applied in the bioimaging of living systems .…”

Tissue Imaging of Glutathione-Specific Naphthalimide–Cyanine Dye with Two-Photon and Near-Infrared Manners

“…For the fluorescence imaging process, the choice of excitation and emission is a key factor for the imaging performance. Near-infrared light is more suitable for fluorescence imaging in tissue and in vivo in comparison to visible light due to its lesser photodamage, deeper tissue penetration, and lower background interference. − On the other hand, compared with the traditional one-photon fluorescence imaging, two-photon microscopy imaging has unique advantages of reducing interference in excitation light energy, self-absorption, autofluorescence, photobleaching, and photodamage. In particular, two-photon imaging can realize deep tissue penetration and high-resolution bioimaging. − In comparison to the near-infrared imaging, two-photon imaging usually focuses on the visible region .…”

Aggregation-induced emission enhancement (AIEE)-active tetraphenylethene (TPE)-based chemosensor for Hg2+ with solvatochromism and cell imaging characteristics

“…[28][29][30][31][32][33] Meanwhile, many stimuli-responsive materials have been reported, including photochromism, mechanochromism, and solvatochromism. [34][35][36][37][38][39][40][41][42][43][44][45][46] At present, the solvatochromism materials have been generally used in chemical and biological systems. 47 To date, many uorescent chemosensors for Hg 2+ have been reported.…”