Tìm thấy 10+ kết quả cho từ khóa "Photochemical properties"
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The photophysical and photochemical properties of the peripherally and nonperipherally tetra-substituted zinc, indium, and metal-free Pc complexes (2a/3a, 2c/3c, and 2d/3d) in DMF were described for comparison.
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These properties of the other studied metallo-phthalocyanines did not investigate because of the paramagnetic behavior of metal ions (Co, Ni, and Cu) in the cavities of these phthalocyanines. The absorbance of the new zinc(II) phthalocyanine (7) was studied in DMSO solutions at different concentrations for determination of the most suitable concentration for further photochemical properties. In this study, the photodegradation behavior of the zinc(II) phthalocyanine (7) was determined in DMSO.
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Investigation of the photophysical and photochemical behavior of substituted zinc phthalocyanines and their water-soluble quaternized derivatives. All studied zinc(II) phthalocyanine complexes generated high singlet oxygen, especially in dimethylsulfoxide, and these properties make them potential photosensitizers for use in the photodynamic therapy of cancer. The effects of the position and quaternization of the substituents on the photophysical and photochemical properties were also ex- amined.
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The concentrationeffect on aggregation properties of compounds 4, 5, and 6 was examined in different molarity of THF, DMSO, and DMF,ranging from 2 × 10 –6 to M. Photophysical and photochemical properties 4.1. Fluorescence features of the complexes (4 to 6) were researched into in DMSO, THF,and DMF. The emission, excitation, and ground state spectra of the macrocyclic molecules (4 and 5) in DMSO are depicted in Figures 3 and S3. Maximum peak of the.
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One of the distinct spectroscopic properties of J-aggregation is a sharp excitonic absorption peak called the J-band, red-shifted from the monomer band.
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. "Characterization and photochemical properties of highly stable silver nanoparticles prepared on montmorillonite clay in n- hexanol.".
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The effect that substituted Pcs have on the splitting of the Q band is highly influenced by the electronic properties of the substituent and the type of the central metal ion. The photophysicochemical properties of synthesized Pcs 2 and 3 were determined in DMF in this work. To conclude, photophysicochemical parameters of the Pcs studied together with their corresponding conjugates, especially complex 3, show these molecules to be potential PDT agents..
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Among these, photodimerization is one of the oldest and most well-established mechanisms for manipulating various types of light-sensitive molecules. 18 − 20 The photophysical and photochemical properties of the photodimerization reaction of anthracene, which occurs favorably under UV light irradiation (250–400 nm), have been widely investigated for the application of photo-responsive materials.
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Redox and photochemical properties of the porphyrins sensitizers..
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It is becoming apparent that nature’s bottom-up approach to functional nanostructures can be mimicked to produce artificial molecules with nanoscaled dimensions and engineered properties. Some of these fascinating chemical systems have intriguing electrochemical and photochemical properties that can be exploited to manipulate chemical, electrical, and optical signals at the molecular level.
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In addition, we report on the effects of peripheral substituent on the photochemical and photophysical parameters of the metal-free (2) and zinc (3) phthalocyanine derivatives. This work also explores the effects of substituents and the central metal ions (metal-free or zinc) of the phthalocyanine compounds’ fluorescence properties and on the quenching of the phthalocyanines by 1,4-benzoquinone (BQ)..
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Scientists are very interested in the axially substituted silicon(IV) Pcs due to their superior structural properties. 11 Silicon(IV) Pc derivatives are capable of forming stacked µ -oxo oligomeric structures in which the stacking axis, formed by Si − O − Si bonds, is orthogonal to the Pc π -planes. The aim of the present study is the synthesis of novel Pc compounds as photosensitizers for PDT in cancer treatment.
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Condition for development of photochemical smog. Certain conditions are required for the formation of photochemical smog. (2) The time of day is a very important factor influencing on the amount of photochemical smog. 1 illustrates the typical daily variation in the key chemical factors in photochemical smog formation.. Generalized reaction scheme for photochemical smog formation.
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Finally, determination of the photophysical properties and the dipole moments of these biologically active novel molecules is of great importance in many areas such as nonlinear optical devices, chemical sensing, and understanding the photochemical and photobiological processes.. Solvents and Solvent Effects in Organic Chemistry
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Structural and physico-chemical properties of the obtained nanocomposites were characterized by XRD, SEM, BET, FTIR, and particle size analyzer. Complete photodegradation of MG was successfully achieved with the aid of the nanocomposites. The optimum photocatalytic degradation conditions, irradiation time, irradiation power, and amount of catalyst were studied.
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Properties model traits of a class or object. provide advantages of private field / public accessor pattern – with clean user syntax
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Although SNS-DTE did not retain its photochemical switching properties after polymerization, it was noted that the polymer exhibited remarkable electrochromic features. it can be switched from green in the neutral state to violet state under applied external potentials without disturbing the photochromic units.
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Section 21.7: Photochemical Smog. 21.51 What i s photochemical smog? Lis t the factors that favor the formation of photochemical smog. 21.52 What are primary and secondary pollutants?. 21.53 Identify the gas that is respon s ible for the brown color of photochemical smog.. 21.54 The s afety limits of ozone and carbon monoxide are 120 ppb. 21.55 Suggest ways to minimi ze the formation of photochemical smog . 21.56 In which region of the atmosphere is ozone beneficial?
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This means that any properties of the UIObject class become available as properties of the UIComponent class. But the UIComponent class doesn't just inherit all of the properties of the UIObject class. UIComponent.enabled UIComponent.tabIndex. This means that most component classes not only inherit the enabled and tabIndex properties of the UIComponent class, but also all of the properties of the UIObject class, because the UIComponent class extends the. UIObject class.
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The semicrystalline nature of PPDO makes it possible to adjust the final physical properties of the applications through isothermal annealing. Obtaining optimum properties for future polymer devices produced by PPDO would require an understanding of the annealing process. However, to our knowledge, there is still a lack of a clear relationship between heat treatment and the properties of PPDO.