Bhowmik Pradip K, King David, Han Haesook, Wacha András F, Knaapila Matti
Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454003, Las Vegas, NV 89154, USA.
Research Center for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tedesko Köútja 2, H-1117 Budapest, Hungary.
Polymers (Basel). 2025 Jun 27;17(13):1785. doi: 10.3390/polym17131785.
Main-chain conjugated and non-conjugated polyelectrolytes are an important class of materials that have many technological applications ranging from fire-retardant materials to carbon-nanotube composites, nonlinear optical materials, electrochromic materials for smart windows, and optical sensors for biomolecules. Here, we describe a series of poly(pyridinium salt)s-fluorene containing 9,9-bis(4-aminophenyl)fluorene moieties with various organic counterions that were synthesized using ring-transmutation polymerization and metathesis reactions, which are non-conjugated polyelectrolytes. Their chemical structures were characterized by Fourier transform infrared (FTIR), proton (H) and fluorine 19 (F) nuclear magnetic resonance (NMR) spectrometers, and elemental analysis. They exhibited polyelectrolytic behavior in dimethyl sulfoxide. Their lyotropic liquid-crystalline phases were examined by polarizing optical microscopy (POM) and small angle X-ray scattering (SAXS) studies. Their emission spectra exhibited a positive solvatochromism on changing the polarity of solvents. They emitted greenish-yellow lights in polar organic solvents. They formed aggregates in polar aprotic and protic solvents with the addition of water (/, 0-90%), whose λ peaks were blue shifted.
主链共轭和非共轭聚电解质是一类重要的材料，具有许多技术应用，范围从阻燃材料到碳纳米管复合材料、非线性光学材料、智能窗户的电致变色材料以及生物分子光学传感器。在此，我们描述了一系列含有9,9-双（4-氨基苯基）芴基团且带有各种有机抗衡离子的聚（吡啶鎓盐）-芴，它们是通过环转化聚合和复分解反应合成的非共轭聚电解质。其化学结构通过傅里叶变换红外（FTIR）、质子（H）和氟19（F）核磁共振（NMR）光谱仪以及元素分析进行表征。它们在二甲基亚砜中表现出聚电解质行为。通过偏光显微镜（POM）和小角X射线散射（SAXS）研究考察了它们的溶致液晶相。在改变溶剂极性时，它们的发射光谱呈现正溶剂化显色现象。它们在极性有机溶剂中发出绿黄色光。在极性非质子和质子溶剂中加入水（体积分数为0 - 90%）时会形成聚集体，其λ峰发生蓝移。
