Structural Manipulation of Aminal-crosslinked Polybutadiene for Recyclable and Healable Elastomers

2021 ◽  
Author(s):  
Zheng-Hai Tang ◽  
Hui Zeng ◽  
Si-Qi Wei ◽  
Si-Wu Wu ◽  
Bao-Chun Guo
Keyword(s):  
Structural Manipulation

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>

Structural Manipulation of Layered TiS 2 to TiS 3 Nanobelts through Niobium Doping for High‐Performance Supercapacitors

2020 ◽  
Vol 7 (24) ◽  
pp. 4985-4989
Author(s):  
Ali Sajedi‐Moghaddam ◽  
Carmen C. Mayorga‐Martinez ◽  
Jayraj V. Vaghasiya ◽  
Osamah Alduhaish ◽  
Zdenek Sofer ◽  
...  
Keyword(s):  
High Performance ◽  
Niobium Doping ◽  
Structural Manipulation

Elizabeth Bishop and ‘a bad case of the Threes’

2019 ◽  
pp. 164-176
Author(s):  
Katrina Mayson
Keyword(s):  
Third Space ◽  
The Other ◽  
Elizabeth Bishop ◽  
Gerard Manley Hopkins ◽  
Safe Place ◽  
Holy Trinity ◽  
The Third ◽  
Lyric Poet ◽  
Structural Manipulation

This chapter explores aspects of Bishop’s poetics through the lens of the number three, contributing to the debate about Bishop’s place as a ‘lyric’ poet. It does this by charting the myriad ways Bishop used the number three and all its connotations in her poetry. These range from her use of the tercet form to a structural manipulation of time and perspective. Threes are everywhere in Bishop, ranging from the influence of Gerard Manley Hopkins, the Holy Trinity and Dante to ekphrastic notions of shadow boxes in ‘Objects & Apparitions’. That three underpins Bishop’s aphoristic ear is most clearly heard in her prose and letters, for example in her famous statement that ‘The three qualities I admire in the poetry I like best are: Accuracy, Spontaneity, Mystery’ (in ‘Writing Poetry is an Unnatural Act’). Bishop scholars and readers often identify with the quality of reticence in her poetry, often referred to as ‘the other’ or the ‘third space’ where the reader can find or suggest meaning between the hidden and the said. What is less commonly acknowledged is that the threes can also be constructed to create a safe place in which to allow dangerous emotions or thoughts to be expressed.

scholarly journals Structural manipulation of aporphines via C10 nitrogenation leads to the identification of new 5-HT7AR ligands

2020 ◽  
Vol 28 (15) ◽  
pp. 115578
Author(s):  
Anupam Karki ◽  
Hari K. Namballa ◽  
Ian Alberts ◽  
Wayne W. Harding
Keyword(s):  
Structural Manipulation

Tailoring structural features and functions of fullerene rod crystals by a ferrocene-modified fullerene derivative

CrystEngComm ◽  
2020 ◽  
Vol 22 (38) ◽  
pp. 6287-6294
Author(s):  
Bohong Jiang ◽  
Qin Tang ◽  
Wenli Zhao ◽  
Jiao Sun ◽  
Rong An ◽  
...  
Keyword(s):  
Structural Features ◽  
Fullerene Derivative ◽  
Precipitation Process ◽  
Structural Manipulation

Effective functional intercalation and facile structural manipulation of fullerene crystals could be achieved by ferrocene-modified fullerene based on the liquid–liquid interfacial precipitation process.

Synergetic Effect between Structural Manipulation and Physical Properties toward Perspective Electrochromic n-Type Polyimides

2019 ◽  
Vol 52 (21) ◽  
pp. 8040-8055 ◽  
Author(s):  
Catalin-Paul Constantin ◽  
Andra-Elena Bejan ◽  
Mariana-Dana Damaceanu
Keyword(s):  
Physical Properties ◽  
Synergetic Effect ◽  
Structural Manipulation

Structural manipulation of colloidal silica

Nanoscale ◽  
2011 ◽  
Vol 3 (5) ◽  
pp. 2329
Author(s):  
Jesse Roose ◽  
Klaus Rischka ◽  
Karsten Thiel ◽  
Andreas Hartwig
Keyword(s):  
Colloidal Silica ◽  
Structural Manipulation
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