In this paper, 2,4,6-triphenyl pyridine-functionalized polytyrosine (Pyridine-PTyr) was successfully synthesized by living ring-opening polymerization where 2,6-bis(4-aminophenyl)-4-phenylpyridine (Pyridine-NH 2 ) was an initiator. The photo-physical characteristics of Pyridine-NH 2 and Pyridine-PTyr was elucidated via UV-Vis absorption and photoluminescence spectra, revealing that unlike Pyridine-10 PTyr, Pyridine-NH 2 shows solvatochromic effects in solvents of different polarities. Additionally, Pyridine-NH 2 exhibited aggregationcaused quenching (ACQ) phenomena; however, it became an aggregation-induced emission (AIE) material after attachment to the rigidrod conformation of polytyrosine. Based on differential scanning calorimetry results, we observed that after blending Pyridine-PTyr with P4VP revealed a single glass transition temperature due to their miscibility through intermolecular hydrogen bonding of phenolic OH groups in PTyr backbone and pyridine ring in P4VP as indicated by IR spectroscopy. Obviously, the emission intensity of Pyridine-PTyr 15 was decreased after blending with P4VP and hypsochromic shift from 536 to 489 nm, presumably due to the release of the restricted intramolecular rotation of triphenyl pyridine unit in the center of the polymer and the polymer chain of Pyridine-PTyr becomes separated random coils based on WAXD results. 50 ---concluded the blending of poly(γ-benzyl-L-glutamate) (PBLG) 60 with random-coil oligomers through intermolecular hydrogen bonding to hydrogen bond donor polymers, the secondary blending with other structures of PBLG were altered. 19,20 Also, we demonstrated that the chain behavior of PTyr/P4VP blend through intermolecular hydrogen bonding in MeOH, and DMF 65 95 polypeptide through covalent chemical bonding and ionic interactions. 28 For example, Hong et al. designed two kinds of PBLG as TP1PBLG and TP2PBLG containing Scheme 1: Synthesis of (a) Pyridine-NO 2 , (b) Pyridine-NH 2 , and (c) Pyridine-PTyr tetraphenylthiophene (TP) with aggregation-induced emission property. These researchers found that the emission intensity of 5 65 Synthesis of Pyridine-PTyr by ring opening polymerization (ROP) of Tyr-NCA Tyr-NCA (3.00 g, 11.34 mmol) was weighted in a dry box under N 2 , placed in three-neck bottle, and dissolved in anhydrous DMF 70 (20 mL). The solution mixture was stirred for 15 min prior to the

Supramolecular complex of azobenzene carboxylic acid/pyridine functionalized benzoxazine system featured significantly lower curing temperatures and maintain high water contact angles.

In this report, we designed a new and simple salicylaldehyde azine-functionalized benzoxazine (Azine-BZ) monomer via Mannich condensation reaction of aniline and paraformaldehyde with 1,2-bis(2,4-dihydroxybenzylidene)hydrazine in 1,4-dioxane. Compared with 10 3-phenyl-3,4-dihydro-2H-benzooxazine monomer (263 °C), the maximum exothermic peak of Azine-BZ was shifted to a lower temperature (213 °C) based on differential scanning calorimetry (DSC) analyses because of the basicity of the phenolic group (OH) in the ortho position and the azine groups. Blending Azine-BZ with different weight ratios of zinc perchlorate [Zn(ClO 4 ) 2 ] to form benzoxazine/zinc ion complexes not only afflicted the thermal properties based on thermogravimetric analysis (TGA) due to physical crosslinking through metal-ligand interactions, but also expedite ring-opening polymerization, decreasing the curing temperature from 15 213 to 184 °C (at 10 wt% Zn 2+ ). Based on the fluorescence results, the Azine-BZ and AZine-BZ/Zn(ClO 4 ) 2 complexes were nonemissive in THF solution. Their fluorescence increased gradually upon on the addition of water contents as poor solvent. Interestingly, both the pure Azine-BZ and blending wotj Zn(ClO 4 ) 2 still emitted light after thermal curing at 150 °C, as determined through photoluminescence measurements, indicating that the azine group could act as a probe of the curing behavior of the benzoxazine monomer, as well as a fluorescent chemosensor for Zn 2+ and, possibly, other transition metal ions through a metal-ligand charge transfer 20 mechanism. 45 polybenozoxazine chemistry offers flexibility of many molecular designs, thereby facilitating the preparation of different PBZ nanocomposites. To control the properties of PBZs, several derivatives functionalized with reactive groups A new salicylaldehyde azine-functionalized benzoxazine (Azine-BZ) monomer formed benzoxazine/zinc ion complexes 5 that not only improved the thermal properties but also facilitated ring-opening polymerization.