Stabilities of bis(thienyl)ethenes in polymethyl methacrylate (PMMA) coatings as absorbance modulation layers for nanoscale imaging

Nagorny, Sven; Schewe, Marvin; Weingartz, Thea; Eitzeroth, André; Adams, Jörg; Rembe, Christian; Schmidt, Andreas

doi:10.1039/d3ma00791j

Cited by 1 publication

(2 citation statements)

References 49 publications

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“…A quantification of such an effect was delivered for a series of six bis(thienyl)ethenes, studied in THF organic solutions and in PMMA films under irradiation from lasers or LED lights [189]. The quantum yield of the photocoloring reaction was determined specifically at the isosbestic point of each derivative (located in the region 300-330 nm), and those of the photobleaching reactions were measured by irradiation at the maximum of each colored isomer (in the region 574-605 nm).…”

Section: Challenges/limitationsmentioning

confidence: 99%

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Excitation Wavelength-Dependent Photochemistry

Maafi

2024

Photochem

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The dependence of photochemistry on excitation wavelength is not a recently observed phenomenon; nonetheless, it has, surprisingly enough, been largely ignored in the field. The reasons for this situation are not fully understood but might be related to a provisional extension of Kasha’s rule to photochemistry, or perhaps to a difficulty to justify the kind of short time-scales implied in such photochemistry, that challenges the usually held view giving predominance to fast internal conversion and vibrational relaxation. Regardless of the reasons, it is still a matter of fact that a complete and satisfactory interpretation for experimentally proven wavelength-dependent photochemistry is not yet available and the community endeavor to build a holistic understanding and a comprehensive view of the phenomenon. The present review is a non-exhaustive overview of the published data in the field, reporting on some of the most prominent features, issues, and interpretations.

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Section: Challenges/limitationsmentioning

confidence: 99%

“…The sigmoid function is indicated in the inset. Raw data taken from and adapted with permission from [189].…”

Section: Challenges/limitationsmentioning

confidence: 99%