Photochemical modification of a polymer surface with bifunctional - PowerPoint PPT Presentation

Photochemical modification of a polymer surface with bifunctional dyes of the phenothiazine series of the phenothiazine series Darya Yu. Dzhons, Andrei V. Budruev Lobachevsky State University of Nizhni Novgorod, Gagarin Ave., 23, Nizhnii Novgorod, 603950, Russia. E-mail: budruev@gmail.com 1

The photolysis of substituted aryl azides, for example 2-azidobenzoic acid. 1 1 OH CO 2 H CO 2 H O H 2 O N NH O N DDHA AZP OH OH O 1 O O h ν h ν O O O O N 3 NH N ABA BIK isc OH OH OH 3 R + R ' NH O O O RH NH 2 NH N R CO 2 H azide nitrene N N HO 2 C 2

IR spectra of ТВО (1), TBO – 2– azidobenzoic acid (2), TBO – 3– azidobenzoic acid (3), and TBO – 4– azidobenzoic acid (4) in thin films. Т , % 1 2 3 4 n as (N 3 ) n (NH) 3600 3100 2600 2100 1600 1100 600 ν , с m -1 ν ν ν 3

UV spectra of ТВО (1), TBO – 2– azidobenzoic acid (2), TBO – 3– azidobenzoic acid (3) and TBO–4– azidobenzoic acid (4) in acetonitrile. А 3.0 2.5 2.0 1.5 1 2 1.0 3 0.5 4 0.0 λ, nm 750 λ, λ, λ, 250 350 450 550 650 4

Formation of a difunctional dye 5

The sample PET modified by TBO - 2-azidobenzoic acid. 1 - PET, 2 - PET without irradiation, 3 - PET irradiated for 30 min. A 0.056 0.054 3 3 0.052 2 1 0.050 0.048 λ , nm λ λ λ 450 480 510 540 570 600 6

Sample PET modified by TBO - 3-azidobenzoic acid. 1-PET, 2 - PET without irradiation, 3 - PET irradiated for 30 min. A 0.060 0.058 3 0.056 0.056 2 1 0.054 0.052 0.050 450 470 490 510 530 550 570 590 λ , nm λ λ λ 7

Sample PET modified by TBO- 4 -azidobenzoic acid: 1- PET , 2 - PET without irradiation , 3 - PET irradiated for 30 min. A 0.062 3 2 0.058 1 0.054 0.050 λ , nm 450 480 510 λ λ λ 540 570 600 8

The dependence the optical density at an analytical wavelength of modified PET samples on irradiation time. Concentrations of solutions are 1– 1×10 -3 М , 2– 2.5×10 -3 М , and 3 – 2×10 -4 М . А (540) 0.012 1 0.010 2 0.008 0.008 0.006 3 0.004 0.002 0.000 0 5 10 15 20 25 30 t, min 9