2,5-Bis(4-hydroxyphenyl)thiazolo[5,4-d]thiazole (HPhTT) molecule was synthesized and used as cross-linker in nanotubular self-assembled film preparation. Highly fluorescent, insoluble, PVA based smart films were obtained via orthoester backbone formation at basic media. Both the emission wavelength (λ_em) and photoluminescence (PL) intensity of the films were observed as strongly dependent on dye and base concentrations. These fluorescent films were highly sensitive against acid and base resulting from halochromic property of the cross-linker. These films reversibly changed their colors and λ_em when treated with TFA and NH₃ solutions as a result of dynamic covalent chemistry of orthoester groups. λ_em and PL intensity of these talented films also changed when they were treated with Au, Pt, Ag, Pb, Cd, Co metal cations. Gold, TFA and NH₃ sensitivities of the films make them suitable and promising candidates as chemosensors. The films also selectively reduced gold ions and caused formation of AuNPs on the surface with simultaneous color change, blue shift in λ_em and fluorescent quenching. Green synthesis of hexagonal PbO crystals are also achived inside the films simultaneously. AuNPs on the film and PbO crystal-PVA composite film are characterized with XRD and SEM analysis. These films also exhibited elastic hydrogel property after treatment of acid, base and water. The change in mechanical tensile properties of the films before and after treatment were investigated with stress-strain analysis. Photoluminescence quantum yield (PLQY) of the films were measured as to be between 14% and 39%. Increasing NaOH and dye concentration lead to red shift at λ_em and higher PLQY.

合成了2,5-双(4-羟基苯基)噻唑并[5,4- d ]噻唑(HPhTT)分子，并将其用作纳米管自组装膜制备中的交联剂。通过在碱性介质中形成原酸酯骨架，获得高荧光、不溶性、基于 PVA 的智能薄膜。观察到薄膜的发射波长 (λ _em ) 和光致发光 (PL) 强度都强烈依赖于染料和碱浓度。这些荧光薄膜对酸和碱高度敏感，这是由交联剂的卤致变色特性引起的。由于原酸酯基团的动态共价化学，这些薄膜在用 TFA 和 NH ₃溶液处理时可逆地改变它们的颜色和 λ _em。λ _em当用 Au、Pt、Ag、Pb、Cd、Co 金属阳离子处理这些有才华的薄膜时，它们的 PL 强度和 PL 强度也发生了变化。薄膜对金、TFA 和 NH _{3 的}敏感性使其成为适合和有前途的化学传感器候选者。这些薄膜还选择性地减少了金离子并导致在表面形成 AuNP，同时颜色发生变化，λ _em发生蓝移和荧光猝灭。同时在薄膜内部实现了六方 PbO 晶体的绿色合成。用XRD和SEM分析表征薄膜上的AuNP和PbO晶体-PVA复合薄膜。这些薄膜在酸、碱和水处理后也表现出弹性水凝胶特性。通过应力-应变分析研究了处理前后薄膜机械拉伸性能的变化。薄膜的光致发光量子产率 (PLQY) 经测量在 14% 和 39% 之间。增加 NaOH 和染料浓度会导致 λ _em和更高的 PLQY发生红移。