Photopolymerization of diacetylene single crystals. Optical transmission spectroscopy

A spectroscopic study of the chromatic properties of GafChromic™EBT3 films

“…6,7 Conversely, in the field of physical chemistry, a wide range of polydiacetylene (PDA) molecules have been extensively studied because of their interesting chromatic properties. [8][9][10][11][12][13] In this work, we intend to translate the knowledge on PDA's, more specifically on polyPCDA, to provide insight into the chromatic properties of EBT3 films.…”

Studies of a polymerizable crystal : I. - structure of monomer pts (bis-p-toluenesulphonate of 2,4-hexadiyne 1,6-diol) by neutron diffraction at 120 and 221 k

“…The lattice contraction along b upon complete polymerization is therefore only 0.17 A at 120 K, compared to 0.27 A at 300 K, using the quasi temperature-independent polymer value of b = 4.917 A [3,24]. Despite this smaller contraction, polymer chain propagation is blocked below 105 K [25]. Lattice mismatch along b is therefore not the only structural feature important in the polymerization of pTS.…”

Intrinsically Porous Polydiacetylene from a Functionalized Bowl-Shaped Hexaphenoxycyclotriphosphazene Derivative

“…23 The four azide-terminated side chains were attached to the precursor intermediate HPTP-Pg through CuAAC to yield targeted monomers HPTP-1, HPTP-2, HPTP-3, and HPTP-4 in good to excellent yields. 50 1 H, 13 C, and 31 P NMR spectroscopy and mass spectrometry were employed to confirm the chemical structure of the final products. Detailed synthetic procedures and chemical characterization of all intermediates are provided in the Supporting Information.…”

“…Typical examples for intrinsically porous molecular building blocks are macrocycles like calixarenes, 7 cage-like molecules, 8,9 and a range of molecules with shape-persistent covalent cavities. 10−12 The topochemical polymerization of diacetylene (DA) derivatives in condensed phases by ultraviolet (UV) irradiation 13,14 or thermal annealing 15,16 generates polydiacetylene (PDA), a conjugated polymer with interesting mechanical, optical, and electrical properties. 17−22 Important advantages of this polymerization are its relatively mild conditions (UV irradiation at room temperature or heat between 100 and 150 °C), 23 its additive-free reaction conditions, 23−25 and its topochemical characteristics that usually preserve the supramolecular structure of the precursor material.…”