High molecular weight multifunctional fluorescent polyurea: Isocyanate-free fast synthesis, coating applications and photoluminescence studies

Favorable Heteroaromatic Thiazole-Based Polyurea Derivatives as Interesting Biologically Active Products

“…1 H NMR spectra: (850 MHz, DMSO-d 6 , δ) = 7.7-7.3 (m, 8 H of aromatic and 2-CH-S) and 6.9 (s, 4 H, NH 2 ) (Figure S5). 13 S6).…”

“…All spectra were collected between wavenumbers of 600 and 4000 cm −1 . The 1 H NMR and 13 C NMR spectra, obtained using CDCl 3 and DMSO-d 6 , respectively, were recorded on a Bruker Advance 850 MHz spectrometer. The produced polymers' solubility characteristics were estimated under the same conditions with numerous solvents, namely, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), benzene (C 6 H 6 ), chloroform (CHCl 3 ), dichloromethane (CH 2 Cl 2 ), tetrahydrofuran (THF), acetone, formic acid, and concentrated sulfuric acid.…”

“…1 HNMR spectra: (850 MHz, CDCl 3 , δ) = 7.4-7.9 (m, 8 H of aromatic) and 4.6 (s, 4 H of CH 2 choloroacetyl) (Figure S2). 13 CNMR (850 MHz, CDCl 3 , δ) = 190.24, 141.98, 132.99, 130.82, and 45.76 (Figure S3).…”

“…Due to the extensive degree of intermolecular hydrogen bonding in polyurea, both conventional and sulfur-containing polyurea have high mechanical toughness [ 1 , 4 , 7 , 8 ]. Additionally, they have thermal and chemical resistance, which enables them to be used for a wide variety of applications, including in biomedicine, inks, dyes, corrosion protection adhesives, and coatings [ 5 , 9 , 10 , 11 , 12 , 13 ]. When the full delocalization of electrons in the form of nitrogen, oxygen, and sulfur occurs, the polymers might be deemed to be more corrosion-resistant at lower concentrations.…”

Stimuli-responsive fluorescent nanogel: a nonconventional donor for ratiometric temperature and pH sensing

“…Recently, as alternatives to conventional p-conjugated/aromatic systems, nonconventional polymer fluorophores, such as poly-(aminoamide) (PAMAM), poly(etheramide), and poly(aminoester) (consisting of different subgroups such as -OH, CQO, or -NH 2 with electron-rich heteroatoms) have attracted much attention. [26][27][28] To the best of our knowledge, the use of such nonconventional polymer fluorophores for the design of stimuli-responsive polymer based ratiometric sensors has not been investigated, although recently these fluorophores have been used as a sensor based on AIE dependent single fluorescence intensity. 2 Therefore, in this work we have designed and synthesized a dual stimuli responsive nanogel based sensor for the ratiometric detection of both temperature and pH (Scheme 1).…”