PAMAM-Based Dendrimers with Different Alkyl Chains Self-Assemble on Silica Surfaces: Controllable Layer Structure and Molecular Aggregation

2018 ◽  
Vol 122 (25) ◽  
pp. 6648-6655 ◽  
Author(s):  
Minghui Zhang ◽  
Hui Yang ◽  
Shujuan Wang ◽  
Wei Zhang ◽  
Qingfeng Hou ◽  
...  
Keyword(s):  
Layer Structure ◽  
Molecular Aggregation ◽  
Alkyl Chains ◽  
Silica Surfaces ◽  
Controllable Layer

Continuously tunable emission color based on the molecular aggregation of (2Z,2′Z)-2,2′-(1,4-phenylenae)bis(3-(4-(dodecyloxy)phenyl)acrylonitrile)

RSC Advances ◽  
2016 ◽  
Vol 6 (98) ◽  
pp. 96196-96201 ◽  
Author(s):  
Hongbo Lu ◽  
Chao Zhang ◽  
Guo Xia ◽  
Shaojun Wu ◽  
Guobing Zhang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Photoluminescence Spectrum ◽  
Layer Structure ◽  
Helical Structure ◽  
Blue Shift ◽  
Molecular Aggregation ◽  
Emission Color ◽  
Pitch Length ◽  
Tunable Emission

A luminescent liquid crystal self-assembles to a layer structure or a helical structure with different pitch length depending on the stacking rate; a photoluminescence spectrum blue-shift from 600 nm to 506 nm.

Zur Chemie von Uranglimmern mit Trimetavanadationen und Schichstruktur (Uvanit), II / The Chemistry of Uranylvanadates with Trimetavanadate Ions and Layer Structure (Uvanite), II

1973 ◽  
Vol 28 (7-8) ◽  
pp. 408-415 ◽  
Author(s):  
Klaus Beneke ◽  
Ulrich Grosse-Brauckmann ◽  
Gerhard Lagaly ◽  
Armin Weiss
Keyword(s):  
Layer Structure ◽  
Space Filling ◽  
Interlayer Cations ◽  
Alkyl Chains ◽  
Free Amine ◽  
Intercalation Complexes ◽  
Higher Temperature

The interlayer cations of uvanite can be exchanged quantitatively by n-alkylammoniumions according toM+[UO2V3O9] + CnH 2n+1NH3+⇄ CnH2n+1NH3[UO2V3O9] + M+.In the stoichiometric compounds the alkyl chains of the cations (n= 6-18) are poorlyordered in monolayers and oriented nearly perpendicular to the uranyltrimetavanadatelayers though the space filling is unfavorable with this arrangement. During the cationexchange at pH = 7-9 additional free amine molecules are taken up yielding 1:1 intercalationcomplexes(CnH2n+1NHs) (CnH an+1NH2) [UO2V3O9]with close-packed, well ordered monolayers of alkyl compounds. With excess of pureamines or pure alkanols 1: 3 intercalation complexes(CnH2n+1NH3) (CnH2n+1NH2),[UO2V3O9] or(CnH2n+1NH3) (Cn·H2n+1OH )s[UO2V3O9(n, n′ = 6-18] are formed with the alkyl chains ordered to bimolecular layers. Thesecomplexes rearrange at higher temperature into new phases as a consequence of rotationalisomerisation of the alkyl chains.

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