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The first example of intramolecular ring-opening and reconstruction of cyclobutanone oxime esters via selective C–C bond cleavage leading to the synthesis of 3,4-dihydronaphthalene-2-carbonitriles in the presence of a cheap copper catalyst has been reported. The protocol is distinguished by mild and safe reaction conditions that exclude ligands, oxidants, bases, toxic cyanide salts and tolerates a wide scope of cyclobutanones without compromising their efficiency and scalability. The alternative visible-light-driven photoredox process for this coupling reaction was also uncovered. [ABSTRACT FROM AUTHOR]

4-(Carbazol-9-yl)benzaldehyde could emit yellow RTP, which could last for 3 s because of efficient intersystem crossing. Moreover, multicolor luminescent switches could be realized by simply applying a mechanical force stimulus. [ABSTRACT FROM AUTHOR]

An ultrasensitive photoelectrochemical (PEC) immunoassay was introduced into microfluidic paper-based analytical devices (μ-PADs) based on a multiple electron transfer system for the first time, which was constructed using narrow-band-gap semiconductor nanoparticles (NPs), wide-band-gap semiconductor NPs, and an electron-accepting medium. [ABSTRACT FROM AUTHOR]

A photoelectrochemical immunoassay was introduced for the first time into a microfluidic paper-based analytical device equipped with a paper supercapacitor for low-cost, simple, portable, and disposable point-of-care testing, based on a chemiluminescence light source and a digital multi-meter. [ABSTRACT FROM AUTHOR]