Riacrylate (TMPTA) (Scheme 1).ExperimentalMaterials The substrates utilized for the synthesis of dyes [2methylbenzothiazole, 4-pirydylcarbinol, diiodopropane, trimethylamine, phenylacetic acid chloride, N,Ndicycloheksacarbodiimide, diphenylacetic acid, p-(N,Ndimethylamino)benzaldehyde, p-pyrrolidinobenzaldehyde], 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate [trimethylolpropane triacrylate (TMPTA)], and 1-methyl-2pyrrolidinone (MP) had been bought from Aldrich (Poland) and have been used with no additional purification. The purity of all chemical utilised was as needed for spectroscopic research (99 ). Synthesis of photosensitizers The investigated photosensitizers (NS1, NS2, NS3, and NS4) shown in Scheme 1 were ready in multistep reactions as was described in our earlier paper [20]. The condensation presented in Scheme two is really a last step of synthesis of dyes NS3 and NS4. Particulars of synthesis of sensitizers NS1 and NS2 are presented in literature [20] and will not be repeat right here. The synthesis of 2-methylbenzothiazole quaternary salts: N-propyl-3-[N-2-methylbenzothiazolo]-4-pyridyno phenylacetic acid ester diiodide (A) and N-propyl-3-[N-2methylbenzothiazolo]-4-pyridyno diphenylacetic acid ester diiodide (B), as well as dyes NS1 and NS2 were earlier described by us [20].Price of 201611-92-9 Within the present paper, the synthesis of two sensitizers is presented.1095010-47-1 Data Sheet These photosensitizers (NS1, NS2, NS3, and NS4) have been prepared by Knoevenagel condensation of appropriate 2-Colloid Polym Sci (2015) 293:1865Scheme 1 Structures of sensitizers, co-initiators, and monomermethylbenzothiazole quaternary salt with corresponding benzaldehyde. The synthesis of phenylacetic acid (4-pyridyno)methyl ester and diphenylacetic acid (4-pyridyno)methyl ester was carried out depending on the approach described by Sunderarajan [21]. n-Butyltriphenylborate tetramethylammonium salt (B2), sec-butyltriphenylborate tetramethylammonium salt (B3), tert-butyltriphenylborate tetramethylammonium salt (B4), and tetrakis (n-butylborate) tetramethylammonium salt (B5) had been synthesized according to the technique described by Damico [22]. All compounds were prepared with analytical purity up to accepted requirements for new organic compounds (98 ), which was checked by proton (1H) and carbon (13C) nuclear magnetic resonance (NMR) spectroscopy and elementalScheme 2 The synthesis of photosensitizers (NS3) and (NS4)Colloid Polym Sci (2015) 293:1865analysis. The spectra obtained have been the evidence that the reaction goods had been with the desired structure. Synthesis of dye (NS3): the condensation of N-propyl-3-[N-2-methylbenzothiazolo]-4-pyridyno phenylacetic acid ester diiodide with p-pyrrolidinobenzaldehyde 1 gram of N-propyl-3-[N-2-methylbenzothiazolo]-4pyridyno phenylacetic acid ester diiodide (1.PMID:23614016 0 mmol) and 0.26 g of p-pyrrolidinobenzaldehyde (1.0 mmol) had been suspended in methanol (40 mL), and a couple of drops of piperidine have been added. Quickly, the option turned deep red. The solution was refluxed for 6 h. Just after cooling dark violet solid was filtered off, crystallized kind ethanol and dried on the air. Yield: 69.71 , m.p. 25254 . 1 H NMR (DMSO-d6), (ppm): 2.001 (s, 4H, H2O); 2.375 (m, 2H, H2); three.335.433 (m, 8H, H2); 4.763 (m, 4H, N H2); 6.700.743 (d, 4H, Ar); 7.486.565 (m, 1H, Ar, 1H, H=CH; 7.623.816 (t, 4H, Ar; 1H CH=CH; 7.894.938 (d, 4H, Ar); eight.052.127 (m, 2H, Ar); 8.270.310 (d, 2H, Pyr). 13C NMR (DMSO-d6), (ppm): 2.252; 24.863; 32.309; 33.784; 47.665; 48.293; 96.291; 104.766; 112.384; 115.334; 121.132; 123.826; 133.