Donor-acceptor type helical polyisocyanide bearing carbazole as the pendant groups for nonvolatile memory effect

Semiflexible polymer scaffolds: an overview of conjugation strategies

“…Moreover, we include applications of the grafts in biosensing, bioimaging, drug delivery, optoelectronics, photovoltaics and tissue engineering. [140][141][142][143][144][145]…”

“…The preserved helical conformation of PICs provides an excellent scaffold to develop highly ordered materials with applications in optoelectronics, photonics, memory devices and cell imaging. 143,[215][216][217] Isocyanide monomers are readily obtained via dehydration of the corresponding formamides. Substituents are introduced on PIC scaffolds via direct modification of the isocyanide monomer or by introduction of an active handle targeted towards post-polymerization functionalization.…”

“…216,[219][220][221][222][223] Direct monomer modification has also been applied to introduce carbazoles and a variety of bulky pendants on poly(isocyanide) chains. 143 Although polymerization of modified monomers is a successful strategy to prepare functionalized PIC scaffolds with high spatial control, it is not a versatile strategy as introduction of a new substituent requires a completely new monomer synthesis and consecutive polymerization. Decoration of the PIC scaffold with handles such as azido, alkyne or thiol groups allows for post-polymerization functionalization, which enables facile derivatization of the scaffold towards multiple purposes.…”

Novel carbazole-based donor-isoindolo[2,1-a]benzimidazol-11-one acceptor polymers for ternary flash memory and light-emission

“…11 Therefore, it's an important basic work to investigate polymeric material that possesses good memory performance itself, without additional blending or modication. Several types of polymers can be applied to fabricate memory devices in general, such as poly(N-vinyl carbazole)s (PVKs), 8,[12][13][14] polyuorenes (PFs), 9,15,16 polytriphenylamines (PTPA), 10,17,18 polyimides (PIs), [19][20][21] polymers containing two or more segments mentioned above, [22][23][24][25][26] and polymers containing metal complexes. 27,28 Among these polymers, derivatives of PVK have exhibited excellent memory performances since the containing electron donating carbazole groups could facilitate hole transporting.…”

“…Polymers containing carbazole groups possess two types of structures: carbazole as backbone and carbazole as a pendant linking to sidechain. The latter utilizes the tendency of neighbouring carbazole groups to form a face-to-face conformation that could facilitate charge carriers hopping through under an applied voltage, leading to a high-conductivity state, 14,26,29,30 while the former fully utilizes the property of hole transporting, the advantage of rigid planar structure, and the ease of controlling the photoelectron performance at molecule level by introducing various acceptor directly to the backbone of the carbazole group. 24,31 PIs have been widely used as acceptor because of the excellent thermal, chemical and electro properties and the feasible functionalization of molecule to tune these properties.…”