A novel luminescent hybrid inorganic–organic molecular assembly was synthesised by the condensation of hexakis cyclotriphosphazene hydrazide (CTP-Hyd) with six units of 10-octyl-10H-phenothiazine-3-carbaldehyde (R-PTZ-CHO) for the first time. In particular, synthesis of a new precursor, an inorganic heterocycle, CTP-Hyd, has been developed to append PTZ units on the periphery of the thermally stable CTP ring via condensation. The luminescent hybrid material prepared by the convergent approach was well characterized at each step using a plethora of techniques like FT-IR and multi-nuclear NMR including ¹H, ¹³C and ³¹P as well as HRMS/MALDI-TOF data. Further, the photophysical properties of the synthesised hybrid material were investigated by UV-visible absorption, steady state and time resolved photoluminescence spectroscopy. The synthesised hybrid molecule shows extraordinary solvent compatibility and shows tunable emission in the yellow–green region. A relatively large Stokes shift of 82 nm was observed with varying solvent polarity owing to the charge transfer nature of the electronic transition in the hybrid molecule. The thermal stability and electrochemical properties of key substrates and products were studied using thermal gravimetric analysis (TGA) and cyclic voltammetry studies respectively. The high T_d value of 326 °C inferred that the hybrid CTP-PTZ exhibited superior thermal stability. This study shows important insight into the understanding of the hybrid material properties for possible application in the areas of optoelectronics and bio-imaging.

中文翻译：

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可调谐的黄绿色发射环三磷腈附加吩噻嗪杂化材料：合成，表征，光物理和电化学研究

通过六环三磷腈（CTP-Hyd）与六个单元的10-辛基-10 H-吩噻嗪-3-甲醛（R-PTZ-CHO）的缩合合成了一种新型的发光杂化无机-有机分子组装体。特别地，已经开发了新的前体，无机杂环CTP-Hyd的合成，以通过缩合将PTZ单元附加到热稳定CTP环的外围。通过收敛方法制备的发光杂化材料在每个步骤都使用多种技术（例如FT-IR和包括¹ H，¹³ C和³¹的多核NMR）进行了很好的表征P以及HRMS / MALDI-TOF数据。此外，通过紫外可见吸收，稳态和时间分辨光致发光光谱研究了合成的杂化材料的光物理性质。合成的杂化分子显示出非凡的溶剂相容性，并在黄绿色区域显示出可调的发射。由于杂化分子中电子跃迁的电荷转移性质，在变化的溶剂极性下观察到了82 nm的相对较大的斯托克斯位移。分别使用热重分析（TGA）和循环伏安法研究了关键基材和产品的热稳定性和电化学性能。高T _d326°C的温度可以推断出混合CTP-PTZ具有优异的热稳定性。这项研究显示出对了解混合材料特性的重要见解，以便在光电子学和生物成像领域进行可能的应用。