Optical properties of films of polycarbazolyldiacetylene PDCHD-HS for photonic applications

Two-Photon Spectroscopy of π-Conjugated Polymers: The Case of Poly[1,6-bis(3,6-dihexadecyl-N-carbazolyl)-2,4-hexadiyne] (PolyDCHD-HS)

“…The solid-state structure of this polymer is of the columnar type, with the columns formed by the polycarbazolyldiacetylene chains assembled in a hexagonal bidimensional lattice. 40 Previous reports on this polymer were concerned with photoinduced absorptions, [41][42][43][44] luminescence, 45 time-resolved studies, 46 guided propagation of light, 47,48 UV-vis absorption, fluorescence, and FT-Raman solution studies. 49 In the present paper we will report the results of a two-photon spectroscopic investigation on the red form of polyDCHD-HS in benzene solution at room temperature in the spectral range 375-800 nm (∼3.31-1.55 eV) using both fluorescence and optoacoustic detection.…”

“…The solid-state structure of this polymer is of the columnar type, with the columns formed by the polycarbazolyldiacetylene chains assembled in a hexagonal bidimensional lattice . Previous reports on this polymer were concerned with photoinduced absorptions, − luminescence, time-resolved studies, guided propagation of light, , UV−vis absorption, fluorescence, and FT-Raman solution studies 1 The molecular structure of poly[1,6-bis(3,6-dihexadecyl- N -carbazolyl)-2,4-hexadiyne] (polyDCHD-HS). …”

Optical characterization of quasi-monomolecular layers of the nonlinear polymer polyDCHD-HSPresented at the LANMAT 2001 Conference on the Interaction of Laser Radiation with Matter at Nanoscopic Scales: From Single Molecule Spectroscopy to Materials Processing, Venice, 3–6 October, 2001.

“…4 Finally, the similarity of the electronic spectrum of a dilute toluene solution to that of a film cast from the same solution suggests the presence of isolated chains also in films. 5 All these results make it reasonable to assume a certain degree of order also in spun films and, consequently, to expect an enhancement of their third-order susceptibility. As a matter of fact, a surprisingly large off-resonance value of the intensity-dependent refractive index was measured at 1064 nm with picosecond pulses and using surface plasmon spectroscopy (SPS).…”

Fluorescence Emissions and Torsional Conformations in π-Conjugated Chains of PolyDCHD-HS

“…As a second preparation, the amorphous film of polyDCHD-HS was deposited from a toluene solution on a quartz slide under clean room conditions by means of the spin coating technique. 21,22 Spinning velocity was varied between 600 and 6000 rpm. After deposition on the slide, the film was left at room temperature for ≈30 min and then heated at 70 °C for 1 h to evaporate the solvent.…”

“…Also in our case, aggregation phenomena have been excluded for polyDCHD-HS in both solvents, having checked that absorption profiles were unchanged for concentrations in the range of 10 -4 −10 -6 (mol of repeat units l -1 ). As a second preparation, the amorphous film of polyDCHD-HS was deposited from a toluene solution on a quartz slide under clean room conditions by means of the spin coating technique. , Spinning velocity was varied between 600 and 6000 rpm. After deposition on the slide, the film was left at room temperature for ≈30 min and then heated at 70 °C for 1 h to evaporate the solvent.…”