A New Modular Indole Synthesis. Construction of the Highly Strained CDEF Parent Tetracycle of Nodulisporic Acids A and B

2006 ◽  
Vol 8 (10) ◽  
pp. 2167-2170 ◽  
Author(s):  
Amos B. Smith ◽  
László Kürti ◽  
Akin H. Davulcu
Keyword(s):  
Highly Strained ◽  
Indole Synthesis ◽  
Nodulisporic Acids

Symmetry Breaking and the Turn-On Fluorescence of Small, Highly Strained Carbon Nanohoops

2019 ◽  
Author(s):  
Terri Lovell ◽  
Curtis Colwell ◽  
Lev N. Zakharov ◽  
Ramesh Jasti
Keyword(s):  
Symmetry Breaking ◽  
Theoretical Work ◽  
P Systems ◽  
Quantum Yields ◽  
Size Dependent ◽  
New Class ◽  
Carbon Carbon Bond ◽  
Conjugated Macrocycles ◽  
Structural Manipulation ◽  
Highly Strained

<p>[<i>n</i>]Cycloparaphenylenes, or “carbon nanohoops,” are unique conjugated macrocycles with radially oriented p-systems similar to those in carbon nanotubes. The centrosymmetric nature and conformational rigidity of these molecules lead to unusual size-dependent photophysical characteristics. To investigate these effects further and expand the family of possible structures, a new class of related carbon nanohoops with broken symmetry is disclosed. In these structures, referred to as <i>meta</i>[<i>n</i>]cycloparaphenylenes, a single carbon-carbon bond is shifted by one position in order to break the centrosymmetric nature of the parent [<i>n</i>]cycloparaphenylenes. Advantageously, the symmetry breaking leads to bright emission in the smaller nanohoops, which are typically non-fluorescent due to optical selection rules. Moreover, this simple structural manipulation retains one of the most unique features of the nanohoop structures-size dependent emissive properties with relatively large extinction coefficents and quantum yields. Inspired by earlier theoretical work by Tretiak and co-workers, this joint synthetic, photophysical, and theoretical study provides further design principles to manipulate the optical properties of this growing class of molecules with radially oriented p-systems.</p>

Symmetry Breaking and the Turn-On Fluorescence of Small, Highly Strained Carbon Nanohoops

2019 ◽  
Author(s):  
Terri Lovell ◽  
Curtis Colwell ◽  
Lev N. Zakharov ◽  
Ramesh Jasti
Keyword(s):  
Symmetry Breaking ◽  
Theoretical Work ◽  
P Systems ◽  
Quantum Yields ◽  
Size Dependent ◽  
New Class ◽  
Carbon Carbon Bond ◽  
Conjugated Macrocycles ◽  
Structural Manipulation ◽  
Highly Strained

<p>[<i>n</i>]Cycloparaphenylenes, or “carbon nanohoops,” are unique conjugated macrocycles with radially oriented p-systems similar to those in carbon nanotubes. The centrosymmetric nature and conformational rigidity of these molecules lead to unusual size-dependent photophysical characteristics. To investigate these effects further and expand the family of possible structures, a new class of related carbon nanohoops with broken symmetry is disclosed. In these structures, referred to as <i>meta</i>[<i>n</i>]cycloparaphenylenes, a single carbon-carbon bond is shifted by one position in order to break the centrosymmetric nature of the parent [<i>n</i>]cycloparaphenylenes. Advantageously, the symmetry breaking leads to bright emission in the smaller nanohoops, which are typically non-fluorescent due to optical selection rules. Moreover, this simple structural manipulation retains one of the most unique features of the nanohoop structures-size dependent emissive properties with relatively large extinction coefficents and quantum yields. Inspired by earlier theoretical work by Tretiak and co-workers, this joint synthetic, photophysical, and theoretical study provides further design principles to manipulate the optical properties of this growing class of molecules with radially oriented p-systems.</p>

Modular Counter-Fischer–Indole Synthesis through Radical-Enolate Coupling

2021 ◽  
Vol 23 (3) ◽  
pp. 1096-1102
Author(s):  
Hyunho Chung ◽  
Jeongyun Kim ◽  
Gisela A. González-Montiel ◽  
Paul Ha-Yeon Cheong ◽  
Hong Geun Lee
Keyword(s):  
Fischer Indole Synthesis ◽  
Indole Synthesis

scholarly journals Indirect light absorption model for highly strained silicon infrared sensors

2021 ◽  
Vol 130 (5) ◽  
pp. 055105
Author(s):  
Nicolas Roisin ◽  
Guillaume Brunin ◽  
Gian-Marco Rignanese ◽  
Denis Flandre ◽  
Jean-Pierre Raskin
Keyword(s):  
Light Absorption ◽  
Strained Silicon ◽  
Absorption Model ◽  
Infrared Sensors ◽  
Highly Strained

Ultrathin Amorphous/Crystalline Heterophase Rh and Rh Alloy Nanosheets as Tandem Catalysts for Direct Indole Synthesis

2021 ◽  
pp. 2006711
Author(s):  
Jingjie Ge ◽  
Peiqun Yin ◽  
Ye Chen ◽  
Hongfei Cheng ◽  
Jiawei Liu ◽  
...  
Keyword(s):  
Indole Synthesis

Void-Enriched and Highly Strained Porous Au–Ag Nanoalloy as a Bifunctional Electro-Catalyst in Alkaline Direct Alcohol Fuel Cell

2021 ◽  
Author(s):  
Sandip Kumar De ◽  
Arpita Nandy ◽  
Subrata Mondal ◽  
Anuradha Roy ◽  
Sourav Mondal ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Direct Alcohol Fuel Cell ◽  
Alcohol Fuel ◽  
Highly Strained

Electrical resistivity of a highly strained sample of potassium

Physica B+C ◽  
1981 ◽  
Vol 108 (1-3) ◽  
pp. 907-908 ◽  
Author(s):  
Meir Danino ◽  
Moshe Kaveh ◽  
Nathan Wiser
Keyword(s):  
Electrical Resistivity ◽  
Highly Strained
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