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A novel fluorescence chemosensor array composed of pyrenylboronic acid-based probes for multi-anion detection has been developed. The pyrenylboronic acid derivatives showed fluorescence quenching or enhancement due to photoinduced electron transfer originating from anion binding. The recognition ability was assessed by fluorescence titrations and electrospray ionization mass spectrometry. Because the array is constructed with cross-reactive probes, the combination of differential binding affinities for anions (i.e., fluoride, acetate, oxalate, malonate, citrate, dihydrogen phosphate, and pyrophosphate) and pattern recognitions, such as linear discriminant analysis, offered a successful simultaneous anion detection with a classification rate of 100%. Furthermore, the chemosensor array allowed for quantitative prediction of oxalate, malonate, and citrate in mixtures using a support vector machine. Importantly, the array system employs low-cost and commercially available reagents as probes. Thus, this study could lead to the development of user-friendly and high-throughput methods to detect a variety of analytes in complicated systems.

Poly(4-butyltriarylamine)s with t-butyldimethylsilyl terminal protecting group (PBTPA-TBS) with various molecular weights were prepared by C-N coupling polymerization. The resulting precursors were postfunctionalized and subsequently used as macroinitiators for atom transfer radial polymerization (ATRP) of n-butyl acrylate (n-BA) and ethyl acrylate (EA). Both the polymerization processes were controlled and the polymers were characterized by 1 H NMR, gel permeation chromatography (GPC) and thermal properties, which confirmed the successful synthesis of all the polymers. The microphase separated behaviors of the poly (4-butyltriarylamine)-block-poly (butyl acrylate) (PBTPA-b-PBA) were examined by AFM in the film showing phase separation structures for all the polymers. The photorefractive property of the composite based on PBTPA-b-PBA block copolymer was evaluated by two-beam coupling experiment. A relative high gain coefficient of 42.7 cm −1 was obtained at the electric field of 31 V/m.

A new bifunctional photorefractive active succinate (TPD-2DCVA) consisting of a tetraphenyldiaminobiphenyl (TPD) unit and 4-dicyanovinylaniline (DCVA) moieties was prepared, which forms stable molecular glass. The glass-transition temperatures (Tg’s) of TPD-2DCVA-based composites were efficiently controlled by the doping of small amount of plasticizers. The compound possesses a high photoconductivity of 2.1 × 10−9 cm Ω−1 W−1 at 50 V µm−1. A gain coefficient of 56.7 cm−1 at electric field of 56 V µm−1 was achieved. Fast response times of 29–37 ms were also obtained at low electric fields for these composites.

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