Influence of methyl group in a quinoline moiety on optical and light-induced properties of side-chain azo-polymers

Chomicki, Dariusz; Kharchenko, O.; Skowroński, Łukasz; Kowalonek, Jolanta; Smokal, Vitaliy; Krupka, Oksana; Derkowska-Zielinska, Beata

doi:10.1007/s13204-021-01764-0

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…It also differs from some quinoline polymers with optical properties in that the quinoline segment is not located in the pendant group [ 36 , 71 , 72 ]. There is only one report of polymers with the quinoline sequenced in the backbone and with photoisomerism, but in that case, it causes a hypsochromic shift [ 73 ], whereas PBQT shows a bathochromic shift, which allows its possible use as a colorimetric or fluorimetric sensor. Its optical bandgap of 1.63 to 1.58 eV broadens the range of potential applications for this material, such as chemosensors [ 74 ], photoswitches [ 67 ], smart biomaterials [ 75 ], environmental applications [ 76 , 77 ], and optoelectronic devices in general [ 78 , 79 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Study of the Optical Properties of a Conjugated Polymer with Configurational Isomerism for Optoelectronics

et al. 2023

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A π-conjugated polymer (PBQT) containing bis-(2-ethylhexyloxy)-benzo [1,2-b’] bithiophene (BDT) units alternated with a quinoline-vinylene trimer was obtained by the Stille reaction. The chemical structure of the polymer was verified by nuclear magnetic resonance (1H NMR), Fourier transform infrared (FT-IR), and mass spectroscopy (MALDI-TOF). The intrinsic photophysical properties of the solution were evaluated by absorption and (static and dynamic) fluorescence. The polymer PBQT exhibits photochromism with a change in absorption from blue (449 nm) to burgundy (545 nm) and a change in fluorescence emission from green (513 nm) to orange (605 nm) due to conformational photoisomerization from the trans to the cis isomer, which was supported by theoretical calculations DFT and TD-DFT. This optical response can be used in optical sensors, security elements, or optical switches. Furthermore, the polymer forms spin-coated films with absorption properties that cover the entire visible range, with a maximum near the solar emission maximum. The frontier molecular orbitals, HOMO and LUMO, were calculated by cyclic voltammetry, and values of −5.29 eV and −3.69, respectively, and a bandgap of 1.6 eV were obtained, making this material a semiconductor with a good energetic match. These properties could suggest its use in photovoltaic applications.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Study of the Optical Properties of a Conjugated Polymer with Configurational Isomerism for Optoelectronics

et al. 2023

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“…Chromogenic materials are able to change their optical density depending on external parameters (temperature, applied voltage, etc. ), but their response rate does not ensure the limitation of nanosecond pulses or less [13][14][15]. Therefore, potentially the most suitable media for limiting laser radiation are nonlinear optical materials.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of single-walled carbon nanotubes/water dispersed media exposed to laser radiation with nano- and femtosecond pulse durations

Vasilevsky

Savelyev

Tereshchenko

et al. 2021

kcmf

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The constant increase in the power of laser systems and the growth of potential fields for the application of lasers make the problem of protecting sensitive elements of electro-optical systems and visual organs from high-intensity radiation an urgent issue. Modern systems are capable of generating laser radiation in a wide range of wavelengths, durations, and pulse repetition rates. High-quality protection requires the use of a universal limiter capable of attenuating laser radiation, not causing colour distortion, and having a high transmission value when exposed to low-power radiation. For this, dispersed media based on carbon nanotubes with unique physicochemical properties can be used. Such media have constant valuesof their absorption coefficient and refractive index when exposed to low-intensity laser radiation and change their properties only when the threshold value is reached.The aim of this work was the study of the nonlinear optical properties of an aqueous dispersion of single-walled carbon nanotubes exposed to nano- and femtosecond radiation. For the characterization of the studied medium, Z-scan and fixed sample location experiments were used. The optical parameters were calculated using a threshold model based on the radiation transfer equation.As a result of the experiments, it was shown that the aqueous dispersion of single-walled carbon nanotubes is capable of limiting radiation with wavelengths from the visible and near-IR ranges: nano- (532, 1064 nm) and femtosecond (810 nm). A description of nonlinear optical effects was proposed for when a medium is exposed to radiation with a nanosecond duration due to reverse saturable absorption and two-photon absorption. When the sample exposed for a femtosecond duration the main limiting effect is spatial self-phase modulation. The calculated optical parameters can be used to describe the behaviour of dispersions of carbon nanotubes when exposed to radiation with different intensities. The demonstrated effects allow us to conclude that it is promising to use the investigated media as limiters of high-intensity laser radiationin optical systems to protect light-sensitive elements.

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Design of conjugated materials with side chain azo-linkages

Meena,

Jacob

2023

Macromol. Res.

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Influence of methyl group in a quinoline moiety on optical and light-induced properties of side-chain azo-polymers

Cited by 5 publications

References 33 publications

Synthesis and Study of the Optical Properties of a Conjugated Polymer with Configurational Isomerism for Optoelectronics

Synthesis and Study of the Optical Properties of a Conjugated Polymer with Configurational Isomerism for Optoelectronics

Nonlinear optical properties of single-walled carbon nanotubes/water dispersed media exposed to laser radiation with nano- and femtosecond pulse durations

Design of conjugated materials with side chain azo-linkages

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