Additions and Corrections-Synthesis and Spectra of Di-and Polyphenylanthracenes

Dickerman, S. Carlton; DeSouza, Derek J.; Wolf, Philip

doi:10.1021/jo01023a630

Cited by 3 publications

(7 citation statements)

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“…1) is not coplanar, but rather adopts one of two configurations in which the phenyl rings are twisted about the C anthranyl -C phenyl bond by a torsion angle q cc . 30,31 Theoretical calculations indicate that q cc is 67.9 for DPA in its ground (S 0 ) state, a result in good agreement with the experimental value of q cc $67 . 41 Considerably smaller torsion angles were predicted for the lowest excited states; in the case of S 1 a value of q cc ¼ 56.8 was obtained, while for T 1 a value of q cc ¼ 54.9 .…”

Section: Tertiary Structuresupporting

confidence: 75%

“…1) suggest that the anthranyl group in this molecule is always twisted with respect to the phenyl groups. 30,31 The rotational freedom of this linker therefore enables it to adopt multiple conformations, perhaps even in a dynamic manner, which in turn affects the nature of interlinker interactions. Analysis of the crystal structure confirms this, as the anthranyl cores are twisted by ca.…”

Section: Tertiary Structurementioning

confidence: 99%

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Connecting structure with function in metal–organic frameworks to design novel photo- and radioluminescent materials

et al. 2012

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The exemplary structural versatility and permanent porosity of Metal-Organic Frameworks (MOFs) and their consequent potential for breakthroughs in diverse applications have caused these hybrid materials to become the focus of vigorous investigation. These properties also hold significance for applications beyond those traditionally envisioned for microporous materials, such as radiation detection and other luminescence-based sensing applications. In this contribution we demonstrate that luminescence induced by ionizing radiation (also known as scintillation) is common in appropriately designed MOFs and describe how this property can be harnessed to generate novel materials useful for detecting radiation. Through a diverse selection of MOFs, we explore the structural properties of MOFs that give rise to scintillation and photoluminescence in these materials. These results enable us to define a new structure-based hierarchical system for understanding luminescent properties in MOFs. Finally, we describe some performance metrics for MOF-based scintillation counters, such as luminosity and resistance to radiation damage, and discuss how these materials relate to the current state of the art in scintillation counters.

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Section: Tertiary Structuresupporting

confidence: 75%

Section: Tertiary Structurementioning

confidence: 99%

Connecting structure with function in metal–organic frameworks to design novel photo- and radioluminescent materials

et al. 2012

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“…(2) The wave is kinetically controlled in the pH region where it decreases, indicating combination of the nonprotonated form with protons. (3) Rapid protonation prior to polarographic reduction occurs with 6-substituted purines, including adenine.8 (4) Plots of half-wave potential (Ei/,) vs. pH usually change slope at 0.1-0.3 pH unit higher than pK& (Table I; Figure 2); such behavior frequently indicates a change in the extent of protonation.20-21…”

Section: Discussionmentioning

confidence: 99%

“…Temperature coefficients of z'i for adenine and AMP at pH [3][4] are between 1.1 and 2.2%. Polarization rate has only a slight effect on wave height, e.g., z'i for 0.125 mM adenine at pH 3.0 increases by ca.…”

Section: Methodsmentioning

confidence: 99%

Correlation of electrochemical reduction of adenine nucleosides and nucleotides with structure and orientation in solution

Janik¹,

Elving²

1970

J. Am. Chem. Soc.

121

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“…Xllla, Ri = Ph; R2 = H b, Ri = R2 = Ph c, Ri = R2 = 1-naphthyl d, R, = 9-anthry I; R2 = H the absorption of the component parts indicating almost total absence of electronic interaction between them in the ground and low-lying photoexcited states (162,273,308,309). The similarity between the spectra of 9,10-dimethyl-and 9,10-diphenylanthracenes is presumably due to loss of conjugation in the latter.…”

Section: IImentioning

confidence: 99%