Wavelength Orthogonal Photodynamic Networks

Truong, Vinh X.; Ehrmann, Katharina; Seifermann, Maximilian; Levkin, Pavel A.; Barner‐Kowollik, Christopher

doi:10.1002/chem.202104466

Cited by 24 publications

(15 citation statements)

References 84 publications

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“…To achieve such a high degree of orthogonality, it is essential to understand the wavelength-resolved reactivity for each photoactive component in the solution concerning their absorption spectra in the same solvent. Numerous applications include functionalized surfaces, hydrogels and lithography, control of nucleic acids, gene expression, regulation of enzyme activity and interfering with neuronal processes 15 , 16 .…”

Section: Introductionmentioning

confidence: 99%

A practical perspective for chromatic orthogonality for implementing in photolithography

Kumar

Sha

Yempally

et al. 2023

Sci Rep

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Theoretically, it is more challenging to anticipate the conversion and selectivity of a photochemical experiment compared to thermally generated reactivity. This is due to the interaction of light with a photoreactive substrate. Photochemical reactions do not yet receive the same level of broad analytical study. Here, we close this research gap by presenting a methodology for statistically forecasting the time-dependent progression of photoreactions using widely available LEDs. This study uses NiS/ZnO in perovskite (MAPbI3) solar cells as an additive (5 volume %). The effect of monolithic perovskite solar cells (mPSCs) on forecasting the wavelength of LEDs has been carefully investigated using various characterization methods, including X-ray diffraction (XRD) and Transmission electron microscopy (TEM). The photocatalytic activity was analyzed by measuring the voltage produced. Various factors like selectivity, stability and sensitivity were also examined. This work provides a new perspective to validate NiS/ZnO photocatalysts for predicting the wavelength of different light sources and to apply in photolithography.

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Section: Introductionmentioning

confidence: 99%

A practical perspective for chromatic orthogonality for implementing in photolithography

Kumar

Sha

Yempally

et al. 2023

Sci Rep

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“…[18,19] The longer activation wavelength further allows for their use in conjunction with other photochemical reactions, activated by shorter wavelength of light, in sequence-independent λ-orthogonal systems. [20][21][22][23] While red-shifted absorption of the chromophores can be developed by engineering the chemical structure to expand the π-system via conjugation with aromatic systems, e.g. napthalene, [24,25] anthracene, [26] pyrene, [19] or pyranocarbazole, [27] their photoreactivity can be further controlled by the environment.…”

Section: Introductionmentioning

confidence: 99%

Tuning the photoreactivity of photocycloaddition by halochromism

Truong

Barner‐Kowollik

2022

Aust. J. Chem.

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Harnessing the power of light for chemical transformation is a long-standing goal in organic synthesis, materials fabrication and engineering. Amongst all photochemical reactions, [2 + 2] photocycloadditions are inarguably the most important and most frequently used. These photoreactions have green characteristics by enabling new bond formation in a single step procedure under light irradiation, without the need for heat or chemical catalysis. More recently, substantial progress has been made in red-shifting the activation wavelength of photocycloadditions in response to research trends moving towards green and sustainable processes, and advanced applications in biological environments. In the past 5 years, our team has further expanded the toolbox of photocycloaddition reactions that can be triggered by visible light. In our exploration of photochemical reactivity, we found that reactivity is often red-shifted compared to the substrate's absorption spectrum. Our efforts have resulted in red-shifted photochemical reactions, providing some of the lowest energy -and catalyst-free -photo-activated [2 + 2] cycloadditions (up to 550 nm). More recently, we introduced an additional level of control over such finely wavelength gated reactions by altering the pH of the reaction environment, thus exploiting halochromic effects to enhance or impede the photoreactivity of red-shifted [2 + 2] photocycloaddition reactions. In this account, we discuss the current state of halochromically regulated photochemical reactions and their potential in soft matter materials on selected examples.

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“…1 The prospect of employing light as the clean energy source for synthetic purposes has thus inspired the development of various light-driven molecular systems to generate reactive moieties in organic synthesis, 3 or to gate bond formation and cleavage in soft matter materials. 4 A transformative application of photochemistry is the use of light to regulate chemical reactions in sequence. Specifically, excitation of certain chromophores can cause the rearrangement of molecules into higher-energy stages, e.g.…”

Section: Introductionmentioning

confidence: 99%