UV irradiation induce NLO modulation in photochromic styrylquinoline-based polymers: Computational and experimental studies

Guichaoua, D.; Kulyk, B.; Smokal, Vitaliy; Migalska‐Zalas, A.; Kharchenko, O.; Krupka, Oksana; Kolendo, Oleksiy; Sahraoui, B.

doi:10.1016/j.orgel.2018.12.022

Cited by 33 publications

(13 citation statements)

References 34 publications

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“…From the processing point of view, polymers and polymeric materials appear to be exceptionally versatile as well, as some of them can be prepared in the form of liquid solutions or dispersions but also can be readily processed as powders, fibers, and films, and some selected examples of them can be obtained as single crystals. Accordingly, favorable optical and physicochemical properties of polymers created a fertile niche for investigation of various aspects of their NLO properties, such as electro-optic phenomena, i.e., the linear electro-optic effect (Pockels effect) [15], the quadratic electro-optic effect (optical Kerr effect) [16][17][18], parametric energy conversion in second-harmonic [11][12][13][14][19][20][21] and third-harmonic generation [22][23][24][25][26] variants, and finally the two-photon absorption phenomenon (2PA) [26][27][28][29][30][31], which is at the focus of this paper.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Pigments. Two-Photon Absorption in Crosslinked Conjugated Polymers and Prospects for Remote Nonlinear Optical Thermometry

2020

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Nonlinear optical (NLO) pigments are compounds insoluble in solvents that exhibit phenomena related to nonlinear optical susceptibilities (χ(n) where n = 2,3,...), e.g., two-photon absorption (2PA) which is related to the imaginary part of χ(3). Determination of spectrally-resolved 2PA properties for NLO pigments of macromolecular nature, such as coordination polymers or crosslinked polymers, has long been a challenging issue due to their particulate form, precluding characterizations with standard techniques such as Z-scan. In this contribution, we investigate thus far unknown spectrally-resolved 2PA properties of a new subclass of NLO pigments—crosslinked conjugated polymers. The studied compounds are built up from electron-donating (triphenylamine) and electron-withdrawing (2,2’-bipyridine) structural fragments joined by vinylene (Pol1) or vinyl(4-ethynylphenyl) (Pol2) aromatic bridges. 2PA properties of these polymers have been characterized in broad spectral range by specially modified two-photon excited fluorescence (TPEF) techniques: solid state TPEF (SSTPEF) and internal standard TPEF (ISTPEF). The impact of self-aggregation of aromatic backbones on the 2PA properties of the polymers has been evaluated through extended comparisons of NLO parameters, i.e., 2PA cross sections (σ2) and molar-mass normalized 2PA merit factors (σ2/M) with those of small-molecular model compounds: Mod1 and Mod2. By doing this, we found that the 2PA response of Pol1 and Pol2 is improved 2–3 times versus respective model compounds in the solid state form. Further comparisons with 2PA results collected for diluted solutions of Mod1 and Mod2 supports the notion that self-aggregated structure contributes to the observed enhancement of 2PA response. On the other hand, it is clear that Pol1 and Pol2 suffer from aggregation-caused quenching phenomenon, well reflected in time-resolved fluorescence properties as well as in relatively low values of quantum yield of fluorescence. Accordingly, despite improved intrinsic 2PA response, the effective intensity of two-photon excited emission for Pol1 and Pol2 is slightly lower relative to Mod1 and Mod2. Finally, we explore temperature-resolved luminescence properties under one- (377 nm), two- (820 nm), and three-photon excitation (1020 nm) conditions of postsynthetically Eu3+-functionalized material, Pol1-Eu, and discuss its suitability for temperature sensing applications.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Pigments. Two-Photon Absorption in Crosslinked Conjugated Polymers and Prospects for Remote Nonlinear Optical Thermometry

2020

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“…The structures of the copolymers were confirmed by 1 H NMR spectra and a reasonable accordance was found between the observed n/m values in the polymers in Table 1 . Nevertheless, as expected from higher polymerization ability of methacrylic esters with a styrylquinoline unit [ 17 ], the MMA motifs are generally found to lack in the final composition of the polymers P1 and P3. Glass transition temperatures (T g ) are collected in Table 1 .…”

Section: Methodsmentioning

confidence: 99%

“…It should be noted that, in addition to the properties already listed, in our previous research [ 16 , 17 , 18 ], significant perspectives of methacrylic polymers were reported with chromophores in the side chain for applications, such as optical switches, optical data storage, and holography. The method of ZnO/polymethacrylate-based nanocomposite film preparation and the investigation of optical absorption, photoluminescence, and nonlinear optical properties were observed [ 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of UV-Irradiation and ZnO Nanoparticles on Nonlinear Optical Response of Specific Photochromic Polymers

et al. 2021

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A series of methacrylic styrylquinoline polymers have been synthesized and characterized by spectroscopic and nonlinear optical (NLO) investigations. The NLO properties of studied polymer compounds in the form of thin films prepared by a spin coating method have been investigated by means of second and third harmonic generation via Maker fringe setup with a laser source at 1064 nm and a pulse duration of 30 ps. The results show strong second harmonic signal dependence on polarization configurations. This second harmonic generation (SHG) response was enhanced by UV-irradiation at 366 nm and doping by ZnO nanoparticles (NPs) (100 nm), while the opposite effect was achieved for a third harmonic generation experiment. Thus, values of second and third order nonlinear susceptibilities were determined by theoretical calculations based on comparative models. The remarkable NLO results presented in this paper expose potential optoelectronic and photonic applications.

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“…Azo-quinoline containing methacrylic copolymers were synthesized by free radical polymerization in 10 % N,N’-dimethylformamide (DMF) [ 33 , 34 ]. The methylmethacrylate (MMA) (1.8 mmol) and m1a–m1g (0.6 mmol) and 2,2′-azobisisobutyronitrile (AIBN) (1 wt %) were dissolved in degassed anhydrous DMF.…”

Section: Methodsmentioning

confidence: 99%

“…Then solution was poured into ice-cool water and product was collected by filtration, then washed with a large amount of water. The target products were obtained by recrystallization from hexane or toluene: hexane as follows: Azo-quinoline containing methacrylic copolymers were synthesized by free radical polymerization in 10 % N,N -dimethylformamide (DMF) [33,34]. The methylmethacrylate (MMA) (1.8 mmol) and m1a-m1g (0.6 mmol) and 2,2 -azobisisobutyronitrile (AIBN) (1 wt %) were dissolved in degassed anhydrous DMF.…”

Section: Materials and Synthesismentioning

confidence: 99%

Physico-Chemical and Light-Induced Properties of Quinoline Azo-dyes Polymers

Chomicki

Kharchenko

Skowroński

et al. 2020

IJMS

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We present investigation of optical and photochromic properties as well as of surface quality of thin films of novel methacrylic polymers with 8-hydroxyquinoline azo-dyes in side-chain. Additionally, thermal stability of polymer powders was examined and their glass transition temperature was determined. Optical properties (extinction coefficient and refractive index) were determined by spectroscopic ellipsometry (SE) combined with absorbance measurements. Photoresponsive behavior was investigated by determination of photoisomerization rates under irradiation with unpolarized 365 nm light, as well as by conduction of holographic grating inscription experiment. Thin film quality was determined by atomic force microscopy (AFM) measurements. Thermal analysis was performed by thermogravimetric (TG), derivative thermogravimetric (DTG) and differential scanning calorimetry (DSC) measurements. We found that optical properties as well as photoisomerization rates of investigated polymers are dependent on the substituent in the para position of the phenyl ring. Surface relief grating inscription was successfully generated only for materials with chromophores containing dimethylamino (N(CH3)2) and methyl (CH3) substituents, but all materials exhibited birefringence grating in the bulk. Surface of most thin films was very smooth, but its quality was impaired by neutral (H) as well as carboxyl (COOH) substituent. Thermal stability of copolymers with side-chain chromophores was improved compared to pure poly(methyl methacrylate) (PMMA).

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UV irradiation induce NLO modulation in photochromic styrylquinoline-based polymers: Computational and experimental studies

Cited by 33 publications

References 34 publications

Nonlinear Optical Pigments. Two-Photon Absorption in Crosslinked Conjugated Polymers and Prospects for Remote Nonlinear Optical Thermometry

Nonlinear Optical Pigments. Two-Photon Absorption in Crosslinked Conjugated Polymers and Prospects for Remote Nonlinear Optical Thermometry

Effect of UV-Irradiation and ZnO Nanoparticles on Nonlinear Optical Response of Specific Photochromic Polymers

Physico-Chemical and Light-Induced Properties of Quinoline Azo-dyes Polymers

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