Self-Assembly of Tubular Microstructures from Mixed-Valence Metal Complexes and Their Reversible Transformation by External Stimuli

2011 ◽  
Vol 124 (3) ◽  
pp. 680-683 ◽  
Author(s):  
Keita Kuroiwa ◽  
Masaki Yoshida ◽  
Shigeyuki Masaoka ◽  
Kenji Kaneko ◽  
Ken Sakai ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Self Assembly ◽  
Mixed Valence ◽  
Reversible Transformation ◽  
External Stimuli

Self-Assembly of Tubular Microstructures from Mixed-Valence Metal Complexes and Their Reversible Transformation by External Stimuli

2011 ◽  
Vol 51 (3) ◽  
pp. 656-659 ◽  
Author(s):  
Keita Kuroiwa ◽  
Masaki Yoshida ◽  
Shigeyuki Masaoka ◽  
Kenji Kaneko ◽  
Ken Sakai ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Self Assembly ◽  
Mixed Valence ◽  
Reversible Transformation ◽  
External Stimuli

Topological liquid crystal superstructures as structured light lasers

2021 ◽  
Vol 118 (49) ◽  
pp. e2110839118
Author(s):  
Miha Papič ◽  
Urban Mur ◽  
Kottoli Poyil Zuhail ◽  
Miha Ravnik ◽  
Igor Muševič ◽  
...  
Keyword(s):  
Self Assembly ◽  
Soft Matter ◽  
Structured Light ◽  
Topological Defects ◽  
Photonic Devices ◽  
Light Polarization ◽  
Self Healing ◽  
Fabry Perot ◽  
Self Assembled ◽  
External Stimuli

Liquid crystals (LCs) form an extremely rich range of self-assembled topological structures with artificially or naturally created topological defects. Some of the main applications of LCs are various optical and photonic devices, where compared to their solid-state counterparts, soft photonic systems are fundamentally different in terms of unique properties such as self-assembly, self-healing, large tunability, sensitivity to external stimuli, and biocompatibility. Here we show that complex tunable microlasers emitting structured light can be generated from self-assembled topological LC superstructures containing topological defects inserted into a thin Fabry–Pérot microcavity. The topology and geometry of the LC superstructure determine the structuring of the emitted light by providing complex three-dimensionally varying optical axis and order parameter singularities, also affecting the topology of the light polarization. The microlaser can be switched between modes by an electric field, and its wavelength can be tuned with temperature. The proposed soft matter microlaser approach opens directions in soft matter photonics research, where structured light with specifically tailored intensity and polarization fields could be designed and implemented.

scholarly journals Hydroxylated phosphines as ligands for chalcogenide clusters: self assembly, transformations and stabilization

2017 ◽  
Vol 89 (3) ◽  
pp. 379-392 ◽  
Author(s):  
Maxim N. Sokolov ◽  
Alexander V. Anyushin ◽  
Rita Hernandez-Molina ◽  
Rosa Llusar ◽  
Manuel G. Basallote
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Self Assembly ◽  
Structure Elucidation ◽  
Alkyl Chain ◽  
Chalcogenide Clusters ◽  
Recent Advances

AbstractThis contribution is a documentation of recent advances in the chemistry of chalcogenide polynuclear transition metal complexes coordinated with mono- and di-phosphines functionalized with hydroxo groups. A survey of complexes containing tris(hydroxymethyl)phosphine (THP) is presented. The influence of the alkyl chain in bidentate phosphines, bearing the P–(CH2)x–OH arms, is also analyzed. Finally, isolation and structure elucidation of the complexes with HP(OH)2, P(OH)3, As(OH)3, PhP(OH)2, stabilized by coordination to Ni(0) and Pd(0) centers embedded into chalcogenide clusters, is discussed.

scholarly journals Pyramidal Heteroanion-Directed and Reduced MoV-Driven Assembly of Multi-Layered Polyoxometalate Cages

2018 ◽  
Author(s):  
Qi Zheng, ◽  
Manuel Kupper ◽  
Weimin Xuan ◽  
Hirofumi Oki ◽  
Ryo Tsunashima ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electronic Materials ◽  
Electronic Devices ◽  
Mixed Valence ◽  
The Self ◽  
Model Structure ◽  
Redox Titration ◽  
Metal Centers ◽  
Redox Active ◽  
Tetrabutyl Ammonium

The fabrication of redox-active polyoxometalates (POMs) that can switch between multiple states is critical for their application in electronic devices, yet, a sophisticated synthetic methodology is not well developed for such cluster types. Here we describe the heteroanion-directed and reduction-driven assembly of a series of multi-layered POM cages 1-10 templated by 1-3 redox-active pyramidal heteroanions. The heteroanions greatly affect the selfassembly of the resultant POM cages, leading to the generation of unprecedented three-layered peanut-shaped - 4, 7 and 8 - or bulletshaped - 5 and 6 - structures. The introduction of reduced molybdate is essential for the self-assembly of the compounds and results in mixed-metal (W/Mo), and mixed-valence (WVI/MoV) 1-10, as confirmed by redox titration, UV-Vis-NIR, NMR spectroscopy and mass spectrometry. 11, the tetrabutyl ammonium (TBA) salt derivative of the fully oxidized 3, is produced as a model structure for measurements to confirm that 1-10 are a statistical mixture of isostructural clusters with different ratios of W/Mo. Finally, multilayered POM cages exhibit dipole relaxations due to the presence of mixed valence WVI/MoV metal centers, demonstrating their potential uses for electronic materials.

Effect of tertiary aliphatic amines on self-assembly of TCNQ in mixed-valence state

2013 ◽  
Vol 20 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Kazunori Hayakawa ◽  
Yukiko Tsuji ◽  
Kensuke Naka
Keyword(s):  
Self Assembly ◽  
Valence State ◽  
Mixed Valence ◽  
Aliphatic Amines ◽  
Mixed Valence State

Plasmonic Vesicles of Amphiphilic Gold Nanocrystals: Self-Assembly and External-Stimuli-Triggered Destruction

2011 ◽  
Vol 133 (28) ◽  
pp. 10760-10763 ◽  
Author(s):  
Jibin Song ◽  
Lin Cheng ◽  
Aiping Liu ◽  
Jun Yin ◽  
Min Kuang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Gold Nanocrystals ◽  
External Stimuli
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