Aggregation‐Induced Luminescence of Polyisobutene Succinic Anhydrides and Imides

Abstract

PIB derivatives such as PIBSAs and the corresponding PIBSIs characterized by different contents of functional groups were prepared. They showed luminescence both in their neat form and in heptane solution when the amount of functional groups per polymer chain was higher than a critical value. This behavior is attributed to aggregation-induced emission, a phenomenon caused by the aggregation of non-emissive chromophoric carbonyl groups present on PIB derivatives. AIE was studied in heptane solution as a function of the type (SAs or succinimides) and number of interacting functional groups. The results suggest that fluorescence measurements might be an effective tool to determine the degree of functionalization of PIB derivative

Aggregation‐Induced Emission of Tetraphenylethylene in Styrene‐Based Polymers

“…In order to cut contribution from elastic scattering and refl ection of the laser light, aggregachromic chromophores, a new phenomenon called aggregation-induced emission (AIE) is rapidly expanding in the literature as an effective tool able to relieve the ACQ effect in the condensed phase. [12][13][14][15][16][17][18][19] The AIE phenomenon is based on the fact that luminogen aggregation played a constructive, instead of a destructive, role in the lightemitting process: a series of molecules was found to be non-luminescent in the solution state but emissive in the aggregated state. For example, tetraphenylethylene (TPE) is non-emissive in dilute solutions but becomes highly luminescent when their molecules result aggregated in concentrated solutions or cast into solid fi lms.…”

“…This aggregation‐caused quenching (ACQ) effect has limited the scope of technological applications of the luminogenic molecules. Alongside the development of even more effective aggregachromic chromophores, a new phenomenon called aggregation‐induced emission (AIE) is rapidly expanding in the literature as an effective tool able to relieve the ACQ effect in the condensed phase . The AIE phenomenon is based on the fact that luminogen aggregation played a constructive, instead of a destructive, role in the light‐emitting process: a series of molecules was found to be non‐luminescent in the solution state but emissive in the aggregated state.…”

Emission and Emissive Mechanism of Nonaromatic Oxygen Clusters

“…On one hand, most of them were serendipitously discovered because the emission mechanism understanding remains in its infant stage. [1][2][3][4][5][6][7][8][9][10][11][12] For instance, linear and hyperbranched poly(amide amine)s (PAMAM), [13][14][15] poly(ether amide)s (PEA), [16] and polyethylenimines (PEI) [17] have been reported to be emissive, and several mechanisms, including oxidation, [18] the formation of unsaturated hydroxylamine, [19] and the aggregation of carbonyl phosphorescence was observed. Furthermore, even obvious RTP was recorded for xylitol crystals.…”

Bright Blue Photoluminescence Emitted from the Novel Hyperbranched Polysiloxane‐Containing Unconventional Chromogens

“…Interestingly, the blue fl uorescence exhibited by some appealing polymers loading carbonyl groups but not aliphatic tertiary amines has also been observed, and the luminescence cause is ascribed to the aggregation of the numerous carbonyl groups. [ 20 ] Meanwhile, the siloxane−PAMAM dendrimers and hyperbranched polysiloxanes (HBPSi) incorporating conventional chromogens have been indagated to be luminescent. [ 21 ] We recently reported a facile approach for fabricating novel HBPSi by transesterifi cation reaction of ethoxyl groups ( OC 2 H 5 ) in tetraethoxysilane with hydroxyl groups ( OH) in polyols.…”