A Biomimetic Supramolecular Approach for Charge Transfer between Donor and Acceptor Chromophores with Aggregation‐Induced Emission

Abstract

Supramolecular assembly of chromophores with inherent resistance to aggregation‐induced self‐quenching is significant to applications such as chemical sensing and organic light emitting diodes (OLEDs). In this work, molecular gels with aggregation‐induced emission (AIE) are constructed by simply coassembling AIE chromophores (electron donor or acceptor) with a nonfluorescent molecular gelator. The binary gels are fluorescent even at very low concentrations of the AIE chromophores, indicating that the rotation of their aromatic cores is restricted in the gel network. In tertiary gels, the fluorescence of the donor chromophore can be efficiently reduced by the acceptor chromophore through a combination of static and dynamic quenching process, via charge transfer from the donor to the acceptor. This work demonstrates a convenient approach to fabricate a supramolecular charge transfer system using an AIE donor and acceptor.

Aggregation‐Induced Emission‐Active Gels: Fabrications, Functions, and Applications

“…The chemical structures of typical multicomponent LMWGs are shown in Figure . These typical multi‐component LMWGs are 174 + 177 , 175 + 177 and 176 + 177 , [ 159 ] 178 + 179 , [ 160 ] 178 + silver (Ag + ), [ 161 ] 180 + 181 , [ 162 ] 182 + 183 , [ 163 ] 184 + Zn 2+ , [ 164 ] 142 + 185 , [ 165 ] 142 + 186 , [ 166 ] 142 + 187 , [ 167 ] 188 + 189 and 190 + 189 , [ 168 ] 191 + 192 , [ 169 ] 193 + 194 , [ 170 ] 195 + 196 , [ 171 ] 195 + 197 , [ 172 ] 142 + 198 , [ 173 ] 199 + 200 + Zn 2+ , [ 174 ] 201 + α‐cyclodextrin (α‐CD), [ 175 ] 202 + 203 + 204 , [ 176 ] and 205 + 206 . [ 177 ] Information of the AIE‐active supramolecular gels from the above multicomponent LMWGs is also summarized in Table 5 .…”

Supramolecular Systems Containing B–N Frustrated Lewis Pairs of Tris(pentafluorophenyl)borane and Triphenylamine Derivatives

“…TPA-amide9 was synthesized in three steps, starting from an amidation reaction between t-Boc-protected L-glutamic acid and two dodecylamines, followed by t-Boc deprotection under acidic conditions. 26,27 The target molecule was synthesized by coupling this (S)-2-amino-N 1 ,N 5 -didodecylpentanediamide with 4,4′,4′′-nitrilotribenzoic acid to obtain a white solid in 79% yield. Comparing to TPA-alkyne, these two amide-based TPA derivatives are less electron rich due to the presence of electron-withdrawing groups.…”

Chromophoric Dendrimer-Based Materials: An Overview of Holistic-Integrated Molecular Systems for Fluorescence Resonance Energy Transfer (FRET) Phenomenon

“…Subsequently, the use of dendrimers for those purposes has made it possible to suppress, or at least control, undesirable phenomena, such as chromophore self-quenching and excimer species formation, among others [133,134]. For this, conformationally flexible dendrimers of poly (aryl ether), generations 2 and 3, turned out to be highly useful in the transfer of resonance energy from the lifetime of the fluorescence state of the donor species avoiding the formation of excimers [135].…”