Journal ArticleDOI
A Simple and Convenient Strategy for the Synthesis of Tolanophanes: Synthesis, Characterization and Conformational Analysis of a Novel Tolanophane
Hossein Reza Darabi,Khosrow Jadidi,Ali Mohebbi,Laleh Faraji,Kioumars Aghapoor,Shant Shahbazian,Marjan Azimzadeh,Sareh M. Nasseri +7 more
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TLDR
In this paper, the bromination/dehydrobromination of stilbenophanes was applied to the synthesis of tolanophanes 1a (n = 2) and 1b (n= 4).Abstract:
The bromination/dehydrobromination of stilbenophanes as a practical, simple and efficient strategy is applied to the synthesis of tolanophanes 1a (n = 2) and 1b (n = 4). The method is significantly superior to the reported methods. A careful conformational study on a novel tolanophane 1b showed that the relative stability of its conformers is directly linked to both twist angle between the two arene rings and the orientation of the alkoxy groups. The strong interaction between 1b and CDCl3 at − 60°C is an unusual feature that is attributed to high restriction in its molecular motion.read more
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Selected synthetic strategies to cyclophanes.
TL;DR: This review covers various approaches to meta- and paracyclophanes involving popular reactions and a strategy where the reaction was used for assembling the cyclophane skeleton for further functionalization is included.
Journal ArticleDOI
The synergistic cooperation between MCM-41 and azithromycin: a pH responsive system for drug adsorption and release
TL;DR: MCM-41 is a promising matrix for AZT adsorption with different application from drug delivery to wastewater filtration and the feasibility of designing reliable drug delivery systems by appropriate choice of the matrix and the organic molecule is demonstrated.
Journal ArticleDOI
Conformationally Locked Tolans, β-Sheet Structures, and Photophysical Properties.
TL;DR: Conformationally locked tetrasubstituted tolans were synthesized by introducing a tether on the tolan to demonstrate the utilities of these motifs, and a β-hairpin structure was synthesized and its additional stabilizing effects were evaluated.
Reference EntryDOI
The McMurry Coupling and Related Reactions
Takeshi Takeda,Akira Tsubouchi +1 more
TL;DR: McMurry coupling has been recognized as one of the most efficient methods for the synthesis of alkenes from carbonyl compounds as discussed by the authors, which can be applied to the preparation of various alkenets that are otherwise difficult to prepare.
Journal ArticleDOI
Synthesis, crystal structure and silver complexation of a novel saddle-shaped stilbenophane: NMR and theoretical study on the complex
Hossein Reza Darabi,Marjan Azimzadeh Arani,Abbas Motamedi,Rohoullah Firouzi,Rainer Herges,Ali Mohebbi,Sarah M. Nasseri,Christian Näther +7 more
TL;DR: A new Z,Z-stilbenophane was synthesized and characterised in this article, and the structure has a saddle shape with the π-electrons of the double bonds and the oxygen atoms pointing towards the center of a cavity.
References
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Efficient implementation of the gauge-independent atomic orbital method for NMR chemical shift calculations
Journal ArticleDOI
Conjugated polymer-based chemical sensors.
TL;DR: When considering new sensory technologies one should look to nature for guidance, as living organisms have developed the ultimate chemical sensors.
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Poly(aryleneethynylene)s: Syntheses, Properties, Structures, and Applications
Journal ArticleDOI
Conductance Switching in Single Molecules Through Conformational Changes
Zachary J. Donhauser,Brent A. Mantooth,Kevin F. Kelly,Lloyd A. Bumm,Jason D. Monnell,Joshua J. Stapleton,David W. Price,Adam M. Rawlett,David L. Allara,James M. Tour,Paul S. Weiss +10 more
TL;DR: Over time the conductance switching of single and bundled phenylene ethynylene oligomers isolated in matrices of alkanethiolate monolayers is tracked, concluding that the switching is a result of conformational changes in the molecules or bundles, rather than electrostatic effects of charge transfer.
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A Re-evaluation of the Photophysical Properties of 1,4-Bis(phenylethynyl)benzene: A Model for Poly(phenyleneethynylene)
TL;DR: Photophysical measurements indicate that 1,4-bis(phenylethynyl)benzene behaves in a conventional manner, undergoing emission from the lowest vibrational level of the first excited singlet state, and in highly viscous, low-temperature glasses, the material does exhibit inhomogeneous fluorescence behavior, and wavelength-dependent excitation and emission spectra.