Polydiacetylene/silica nanocomposites with tunable mesostructure and thermochromatism from diacetylenic assembling molecules.
Conjugated polydiacetylene (PDA)/silica nanocomposites with tunable mesostructures and reversible thermochromatism were synthesized through self-directed assembly of diacetylenic silanes. In contrast to the previous studies, where the PDA side chains interacted weakly through noncovalent interactions, the side chains in the present nanocomposites are covalently connected to the inorganic silica frameworks, providing control over the molecular alignment, stability, and electronic properties. Furthermore, tuning the molecular architecture (e.g., the shape and side-chain length) allows control over the mesostructure (e.g., cubic and lamellar) and chromatic response of the nanocomposites (from irreversible to partially reversible and then to completely reversible). As a result of the covalent interactions, the nanocomposites also demonstrate higher reversible chromatic transition temperatures. This work not only provides responsive robust chromatic materials toward practically reusable PDA sensors but also is of great fundamental value for the design of supramolecular assembly and the understanding of the chromatic mechanism of PDA.
Peng
Huisheng
H
Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, USA.
Tang
Jing
J
Pang
Jiebin
J
Chen
Daoyong
D
Yang
Lu
L
Ashbaugh
Henry S
HS
Brinker
C Jeffrey
CJ
Yang
Zhenzhong
Z
Lu
Yunfeng
Y
D000114:Acetylene / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D010316:Particle Size; D000078789:Polyacetylene Polymer; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D053279:Polyynes; D012822:Silicon Dioxide / Q000737:chemistry*; D013816:Thermodynamics; D014961:X-Ray Diffraction
D009942:Organometallic Compounds; D000078789:Polyacetylene Polymer; D011108:Polymers; D053279:Polyynes; C082361:polydiacetylene; D012822:Silicon Dioxide; D000114:Acetylene