The AIEE effect and two-photon absorption (TPA) enhancement induced by polymerization: synthesis of a monomer with ICT and AIE effects and its homopolymer by ATRP and a study of their photophysical properties

Synthesis and Morphology of Two Carbazole–Pyrazoline‐Containing Polymer Systems and Their Electrical Memory Performance

“…[40] However,t he wide absorptionb and appearinga t3 50-550 nm is associated with the intermolecular charge-transfer (ICT) character of the initiator IN end-functionalized in PMCz (PMCz-IN) or embedded in PMCz (PMCz + IN). [42,43] Furthermore, the similara bsorption values of PMCz-IN and PMCz + IN further demonstrate that we have ensured that the two polymeric films have as imilar mass percentage of IN.…”

A New V‐Shaped Organic Fluorescent Compound Integrated with Crystallization‐Induced Emission Enhancement and IntramolecularCharge Transfer

“…However, when a "large" amount of water was added to DMF, the l ab of OZA-SO was slightly blueshifted and the peak intensity of ICT decreased; this was attributed to the formation of aggregates and the inner environment of the aggregates becoming less polar than the outside. [5] The trends of PL intensity and l em , depending on f w in the DMF/water mixtures, are shown in Figure 3 a and c. OZA-SO was nonemissive when it was dissolved in DMF, but did show strong emission in the aggregate state. The PL spectra of OZA-SO in solvent mixtures with a low f w show two peaks (locally excited (LE) emission peak and ICT emission peak) and redshifted as well as decreasing PL intensity, owing to the increasing polarity of the solvent mixtures.…”

“…[1,2] However, most of these compounds only have reasonable emission in dilute solution and their emission in aggregated states becomes much weaker or disappears, owing to the notorious effect of aggregation-caused quenching (ACQ). [4a] More recently, the integration of AIE and intramolecular charge transfer (ICT) into one compound has led to a new phenomenon: [5] this type of material can emit strong fluorescence not only in the solid state or aggregation forms, but also in dilute solutions. [4a] More recently, the integration of AIE and intramolecular charge transfer (ICT) into one compound has led to a new phenomenon: [5] this type of material can emit strong fluorescence not only in the solid state or aggregation forms, but also in dilute solutions.…”

“…[3] Recently, Tangs group and others separately reported an intriguing phenomenon that aggregated molecules could display stronger fluorescence than their dilute solutions; this now is well known as the effect of aggregation-induced emission (AIE). [4a] More recently, the integration of AIE and intramolecular charge transfer (ICT) into one compound has led to a new phenomenon: [5] this type of material can emit strong fluorescence not only in the solid state or aggregation forms, but also in dilute solutions. [4] For example, Zhu and co-workers reported a new donor-acceptor system, tetraphenylethene-naphthalimide (TPE-NI), which displayed dual photoluminescence (PL) activity from both ICT and AIE.…”

Barbituric Derivative Nanoaggregates with Aggregation-Induced Emission and Mechanofluorochromism

“…The theoretical calculation results are consistent with this phenomenon (Figure 4). When f w increases, the molecules begin to accumulate in a limited space and, to some extent, limit the free rotation of the intramolecular rotatable groups, which makes the radiation transition pathway active and leads to enhanced fluorescence emission [20][21][22]. However, when f w > 80% for TTB and TOB, as well as f w > 70% for TTTB, molecules began to precipitate, resulting in weak emission and blue shifts of the λ em [23,24].…”