Optical, Calorimetric, and Mass Spectroscopic Study of Nonthermochromic Crystalline Forms of the Polydiacetylene Bis(ethylurethane)-5,7-Dodecadiyne-1,12-diol (ETCD)

Supramolecular Polymer Materials: Chain Extension of Telechelic Polymers Using a Reactive Hydrogen-Bonding Synthon

“…Association between end groups can be based on a variety of secondary interactions, such as van der Waals, hydrophobic, ionic interactions, or hydrogen bonding. [4] In these polymers, relatively weak association in combination with crystallization leads to physical crosslinks, which result in materials with improved properties. [1] In these materials a reversible network is formed by clustering of the end groups.…”

Rational Design of Conjugated Polymer Supramolecules with Tunable Colorimetric Responses

“…[48] Exposure of single crystals of the PDA derived from bis(ethylurethane)-5,7-dodecadiybe-1,12-diol (ETDC) to boiling chlorobenzene results in the significant blue shift in the near-normal incidence reflection spectra. [51] The color change of the crystals is attributed to the loss of the unreacted monomers and oligomers, which results in an increase in the lattice volume. Thus, reduction of the restriction of a mechanical strain imposed on the polymer sidechains may induce partial distortion of the conjugated p-orbitals, leading to the blue-shift in the reflection spectra.…”

“…Third, PDAs are readily prepared in aqueous solution in the form of nanostructured liposomes, vesicles and wires, properties that enable them to be employed as matrices for biosensing. Finally, nanostructured PDAs undergo a blue-to-red color change in response to heat (thermochromism), [23,46,47] organic solvents (solvatochromism), [48][49][50][51][52] mechanical stress (mechanochromism), [53][54][55][56] and ligandreceptor interactions (affinochromism). [57][58][59][60][61][62][63][64][65][66][67][68][69] The majority of PDA-based chemosensors, reported thus far, function in an irreversible fashion.…”

Network Polydiacetylene Films: Preparation, Patterning, and Sensor Applications

“…Unlike other conjugated polymers, PDAs are uniquely prepared by UV or γ ‐irradiation of molecularly assembled diacetylene monomers without employing additional catalysts or initiators 1–22. Undoubtedly, the most attractive property of PDAs is their brilliant blue‐to‐red color transition, which occurs with environmental perturbations such as heat (thermochromism),23, 24 mechanical stress (mechanochromism),25–28 organic solvents (solvatochromism),29–33 and ligand–receptor interactions (affinochromism) 34–45. These stress‐induced responses that generate a simultaneous fluorescence signal have efficiently been applied to design of bio‐ and chemosensors,34–45 molecular switches,46, 47 photonic materials,48 and information displays 49.…”