Rational Design of Diphenyldiacetylene‐Based Fluorescent Materials Enabling a 365‐nm Light‐Initiated Topochemical Polymerization

Abstract

Photopolymerization of diacetylenes usually requires stringent reaction conditions like high energy irradiation of 254‐nm light or even γ‐rays, which are generally harmful to the human body and thus mild conditions with lower energy irradiation are required. In this study, different diphenyldiacetylene (DPDA) derivatives were rationally designed followed by the investigation of their photopolymerization behavior. It was found that the para‐substituted amino groups could render the absorption band of DPDA bathochromically shifted, ensuring a 365‐nm light wavelength coverage. On this basis, an organogel system was constructed by chemically modifying cholesteryl and lipoic acid onto the DPDA moiety in aromatic solvents. Such uniform self‐assemblies further facilitated to a rather high degree of polymerization by 365‐nm irradiation. As a kind of fluorescent materials, the whole polymerization process of this system can be visualized by a photoluminescent signal.

Geometric Transformations Afforded by Rotational Freedom in Aramid Amphiphile Nanostructures

“…Additionally, the fluorescent nature of the D-AA nanostructures will allow us to investigate conformational changes and intermolecular interactions with domainspecificity of different supramolecular morphologies. 33…”

“…This constrained motion allows us to probe how the molecular conformation impacts the self-assembly pathways. Additionally, the fluorescent nature of the D-AA nanostructures will allow us to investigate conformational changes and intermolecular interactions with domain-specificity of different supramolecular morphologies …”

Chiral Superlattices Self-Assembled from Post-Modified Metal–Organic Polyhedra

“…The modified MOPs reach a diameter larger than 5.0 nm, which in the as-synthesized procedure self-assembled into one-dimensional (1D) columns. Thanks to the dispersity, bottom-up self-assembly was further achieved, which corrected the loose packing, affording well-defined layer-by-layer self-assembly into twisted nanoribbons. , The giant size of the derived MOPs allowed for highly resolved observation of helical packing with chiral superlattices, and the crucial role of cholesteryl groups in spinning the MOPs was validated by virtue of van der Waals (vdWs) and other forces. This work, for the first time, incorporates MOP nanoparticles with atomic precision into chiral superstructures.…”