Photoinduced Electron Transfer in Arylacridinium Conjugates in a Solid Glass Matrix

Jones, Guilford; Yan, Dingxue; Hu, Jingqiu; Wan, Jiandi; Xia, Bing; Vullev, Valentine I.

doi:10.1021/jp072224a

Cited by 53 publications

(61 citation statements)

References 54 publications

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“…4) The wavelength where the intensity-normalized absorption and emission spectra cross provides a means for estimating 00 (Fig. 4c) [71][72][73][74]. For the Aa residues, 00 ranged from about 3 to 3.7 eV (Fig.…”

Section: Photophysical Propertiesmentioning

confidence: 99%

Building blocks for bioinspired electrets: molecular-level approach to materials for energy and electronics

Larsen

Espinoza

Hartman

et al. 2015

Pure and Applied Chemistry

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In biology, an immense diversity of protein structural and functional motifs originates from only 20 common proteinogenic native amino acids arranged in various sequences. Is it possible to attain the same diversity in electronic materials based on organic macromolecules composed of non-native residues with different characteristics? This publication describes the design, preparation and characterization of non-native aromatic β-amino acid residues, i.e. derivatives of anthranilic acid, for polyamides that can efficiently mediate hole transfer. Chemical derivatization with three types of substituents at two positions of the aromatic ring allows for adjusting the energy levels of the frontier orbitals of the anthranilamide residues over a range of about one electronvolt. Most importantly, the anthranilamide residues possess permanent electric dipoles, adding to the electronic properties of the bioinspired conjugates they compose, making them molecular electrets.

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Section: Photophysical Propertiesmentioning

confidence: 99%

Building blocks for bioinspired electrets: molecular-level approach to materials for energy and electronics

Larsen

Espinoza

Hartman

et al. 2015

Pure and Applied Chemistry

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“…The wavelength, λ 00 , at the crossing point between the intensity-normalized spectra provides an estimate for the zero-to-zero energy, E 00 ¼ hc∕λ 00 , which represents the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) optical gap. 5,65,[69][70][71] Inset: cyclic voltammogram of 5Pip for DCM in the presence of 200 mM tetrabutylammonium hexafluorophosphate (scan rate ¼ 200 mV∕s). (b) Reduction potentials of singly oxidized Aa residues, E ð0Þ (Aa •þ þ e − → Aa), obtained from cyclic voltammetry for solvents with different polarity (as represented by the solvent static relative dielectric constants, ε).…”

Section: Principles Of Biodiversity Extended To Electronic Materialsmentioning

confidence: 99%

Bioinspired molecular electrets: bottom-up approach to energy materials and applications

2015

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Abstract. The diversity of life on Earth is made possible through an immense variety of proteins that stems from less than a couple of dozen native amino acids. Is it possible to achieve similar engineering freedom and precision to design electronic materials? What if a handful of nonnative residues with a wide range of characteristics could be rationally placed in sequences to form organic macromolecules with specifically targeted properties and functionalities? Referred to as molecular electrets, dipolar oligomers and polymers composed of non-native aromatic beta-amino acids, anthranilamides (Aa) provide venues for pursuing such possibilities. The electret molecular dipoles play a crucial role in rectifying charge transfer, e.g., enhancing charge separation and suppressing undesired charge recombination, which is essential for photovoltaics, photocatalysis, and other solar-energy applications. A set of a few Aa residues can serve as building blocks for molecular electrets with widely diverse electronic properties, presenting venues for bottom-up designs. We demonstrate how three substituents and structural permutations within an Aa residue widely alter its reduction potential. Paradigms of diversity in electronic properties, originating from a few changes within a basic molecular structure, illustrate the promising potentials of biological inspiration for energy science and engineering.

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“…The data analysis was conducted using IgorPro v. 6 installed on MacOS and Windows workstations (Thomas et al 2010c;Jones and Vullev 2002;Vullev and Jones 2002;Wan et al 2008;Bao et al 2009;Jones et al 2007). …”

Section: Examination Of Qa Semi-quantitativelymentioning

confidence: 99%

Dependence of the quality of adhesion between poly(dimethylsiloxane) and glass surfaces on the composition of the oxidizing plasma

Chau

Millare

Lin

et al. 2010

Microfluid Nanofluid

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Controlled surface oxidation of polydimethylsiloxane (PDMS) is essential for permanent adhesion between device components composed of this elastomer. The permanent adhesion between such microdevice components results from covalent crosslinking across the interfaces between PDMS and other silica-based materials, such as glass, quartz, and PDMS. Optimal duration and conditions of oxidation, attained via treatments with oxygen-containing plasma, are crucial for microfabrication procedures with quantitative yields. While insufficient PDMS oxidation does not provide high enough surface density of siloxyl groups for cross-interface linking, overoxidation of PDMS yields rough silica surface layers that prevent the adhesion between flat substrates. Ideally, for a set of plasma conditions, the range of treatment durations producing permanent adhesion should be as broad as possible: i.e., the surface oxidation of PDMS sufficient for irreversible binding has to complete significantly before the effects of overoxidation become apparent. Such a requirement assures that relatively small fluctuations in the treatment conditions will not result in over-or under-oxidation and, hence, will not compromise the yields of the fabrication procedures. We examined the dependence of the quality of adhesion (QA) between plasma-treated PDMS and glass substrates on the composition of the oxygen-containing plasma and on the radio frequency (RF) of the plasma generator. We observed that plasma generated at megahertz RF provided superior conditions than kilohertz RF. Concurrently, an increase in the oxygen content of binary gas mixtures, used for the plasma, broadened the treatment durations that afford superior QA.

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Photoinduced Electron Transfer in Arylacridinium Conjugates in a Solid Glass Matrix

Cited by 53 publications

References 54 publications

Building blocks for bioinspired electrets: molecular-level approach to materials for energy and electronics

Building blocks for bioinspired electrets: molecular-level approach to materials for energy and electronics

Bioinspired molecular electrets: bottom-up approach to energy materials and applications

Dependence of the quality of adhesion between poly(dimethylsiloxane) and glass surfaces on the composition of the oxidizing plasma

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