Pyridine Ligand Rotation in Self-Assembled Trigonal Prisms. Evidence for Intracage Solvent Vapor Bubbles

2008 ◽  
Vol 130 (24) ◽  
pp. 7629-7638 ◽  
Author(s):  
Jaroslav Vacek ◽  
Douglas C. Caskey ◽  
Dominik Horinek ◽  
Richard K. Shoemaker ◽  
Peter J. Stang ◽  
...  
Keyword(s):  
Vapor Bubbles ◽  
Pyridine Ligand ◽  
Solvent Vapor ◽  
Self Assembled ◽  
Trigonal Prisms

scholarly journals Correction to “Pyridine Ligand Rotation in Self-Assembled Trigonal Prisms. Evidence for Intracage Solvent Vapor Bubbles”

2016 ◽  
Vol 138 (20) ◽  
pp. 6688-6688 ◽  
Author(s):  
Jaroslav Vacek ◽  
Douglas C. Caskey ◽  
Dominik Horinek ◽  
Richard K. Shoemaker ◽  
Peter J. Stang ◽  
...  
Keyword(s):  
Vapor Bubbles ◽  
Pyridine Ligand ◽  
Solvent Vapor ◽  
Self Assembled ◽  
Trigonal Prisms

scholarly journals Solvent- and Light-Sensitive AIEE-Active Azo Dye: From Spherical to 1D and 2D Assemblies

2022 ◽  
Vol 23 (2) ◽  
pp. 965
Author(s):  
Mina Han ◽  
Ikue Abe ◽  
Jihun Oh ◽  
Jaehoon Jung ◽  
Young Ji Son ◽  
...  
Keyword(s):  
Azo Dye ◽  
Organic Dyes ◽  
Solvent Polarity ◽  
Molecular Assembly ◽  
Molecular Structures ◽  
Stimuli Responsive ◽  
Solvent Vapor ◽  
Molecular Core ◽  
Self Assembled ◽  
Solvent Molecules

Fluorescent molecular assembly systems provide an exciting platform for creating stimuli-responsive nano- and microstructured materials with optical, electronic, and sensing functions. To understand the relationship between (i) the plausible molecular structures preferentially adopted depending on the solvent polarity (such as N,N-dimethylformamide [DMF], tetrahydrofuran [THF], and toluene), (ii) the resulting spectroscopic features, and (iii) self-assembled nano-, micro-, and macrostructures, we chose a sterically crowded triangular azo dye (3Bu) composed of a polar molecular core and three peripheral biphenyl wings. The chromophore changed the solution color from yellow to pink-red depending on the solvent polarity. In a yellow DMF solution, a considerable amount of the twisted azo form could be kept stable with the help of favorable intermolecular interactions with the solvent molecules. By varying the concentration of the DMF solution, the morphology of self-assembled structures was transformed from nanoparticles to micrometer-sized one-dimensional (1D) structures such as sticks and fibers. In a pink-red toluene solution, the periphery of the central ring became more planar. The resulting significant amount of the keto-hydrazone tautomer grew into micro- and millimeter-sized 1D structures. Interestingly, when THF-H2O (1:1) mixtures were stored at a low temperature, elongated fibers were stacked sideways and eventually developed into anisotropic two-dimensional (2D) sheets. Notably, subsequent exposure of visible-light-irradiated sphere samples to solvent vapor resulted in reversible fluorescence off↔on switching accompanied by morphological restoration. These findings suggest that rational selection of organic dyes, solvents, and light is important for developing reusable fluorescent materials.

Challenges in the Structure Determination of Self-Assembled Metallacages: What Do Cage Cavities Contain, Internal Vapor Bubbles or Solvent and/or Counterions?

2016 ◽  
Vol 138 (20) ◽  
pp. 6676-6687 ◽  
Author(s):  
Cecile C. Givelet ◽  
Paul I. Dron ◽  
Jin Wen ◽  
Thomas F. Magnera ◽  
Matibur Zamadar ◽  
...  
Keyword(s):  
Structure Determination ◽  
Vapor Bubbles ◽  
Self Assembled

Controlled self-assembly of polymer semiconductors in solution using a solvent-vapor approach

2019 ◽  
Vol 33 (14n15) ◽  
pp. 1940038
Author(s):  
Gyounglyul Jo ◽  
Solip Choi ◽  
Jae Won Jeong ◽  
Gyun Taek Lim ◽  
Jaehan Jung ◽  
...  
Keyword(s):  
Self Assembly ◽  
Solution Treatment ◽  
Molecular Assembly ◽  
Solvent Vapor ◽  
Force Microscopy ◽  
Polymer Semiconductors ◽  
Molecular Ordering ◽  
Vis Spectroscopy ◽  
Self Assembled ◽  
Solvent Molecules

A facile solution treatment strategy for controlling the microstructure of conjugated polymers using a non-solvent vapor is introduced. The content of well-ordered poly(3-hexylthiophene) (P3HT) aggregates in solution was precisely controlled by varying the non-solvent vapor exposure time. P3HT chains were self-assembled upon exposure to the non-solvent vapor to minimize the unfavorable interactions with the non-solvent molecules. The effect of solvent vapor on the molecular ordering and morphologies of P3HT films was investigated by UV-Vis spectroscopy, atomic force microscopy, and polarized optical microscopy. These studies reveal that the self-assembled P3HT aggregates have well-ordered nanofibrillar structures formed via [Formula: see text]–[Formula: see text] stacking. This strategy paves the way toward fabricating well-ordered polymeric structures, especially in the field of opto-electronic applications including FETs, LEDs, and lasers, where proper alignment or molecular assembly is in great demand.

Self-Assembled Nano-Structures of Sandwich-Type Mixed (Phthalocyaninato)(porphyrinato) Rear Earth Complexes. Effect of Porphyrin-Phthalocyanine Ligands on Tuning the Inter-Molecular Interaction

2009 ◽  
Vol 79-82 ◽  
pp. 341-344 ◽  
Author(s):  
Li Na Chen ◽  
Yan Li Chen ◽  
Pei Hua Zhu ◽  
Guo Xin Sun ◽  
Hong Yan Wang ◽  
...  
Keyword(s):  
Electronic Absorption ◽  
Self Assembly ◽  
Molecular Interaction ◽  
Van Der Waals ◽  
Spherical Shape ◽  
Rare Earth Complex ◽  
Solvent Vapor ◽  
Nano Structures ◽  
Sandwich Type ◽  
Self Assembled

phthalocyanine, porphyrin, sandwich rare earth complex, nanostructure, self-assembly. Abstract. Three novel sandwich-type mixed (phthalocyaninato)(porphyrinato) rear earth complexes, namely Ce(DPP)(Pc)(1), Sm2(DPP)(Pc)2(2) and Sm2(DPP)2(Pc)(3) [Pc = dianion of phthalocyanine, DPP= dianion of 5,15-di(phenyl)porphyrin], have been fabricated into nano-assemblies onto the SiO2 surface by a surface assisted solvent-vapor annealing method. The effect of the number of porphyrin and phthalocyanine ligands on the morphology of self-assembled nanostructures of these double- and triple-decker complexes has been systematically studied. Competition and cooperation between the inter-molecular - interaction, van der Waals, and metal-ligand coordination for different compounds results in nanostructures with different morphology from approximately spherical shape with average size of ~300 nm and ~400 nm for 1 and 2, respectively, nano-rods with aspect ratio (length over width) around 5 for 3, which were characterized by electronic absorption, X-ray diffraction (XRD), and atomic force microscopy (AFM). Electronic absorption spectroscopic results reveal the formation of J-aggregates in the nano-structures and suggest the increasing - interaction in the order of 3, 1, to 2. Examination by XRD reveal that in the nanostructures of compounds 1-3, a dimeric supramolecular structure was formed through an intermolecular - interaction and/or van der Waals between two sandwich-type molecules, which as the building block self-assembles into the target nanostructures.

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