Self-assembly of organic acid–base compounds from 2-D layered network to 3-D supramolecular framework: synthesis, structure and photoluminescence

CrystEngComm ◽  
2007 ◽  
Vol 9 (10) ◽  
pp. 907 ◽  
Author(s):  
Simin Wu ◽  
Shuoping Chen ◽  
Ming Li ◽  
Jiangfeng Xiang ◽  
Yong Xiao ◽  
...  
Keyword(s):  
Organic Acid ◽  
Self Assembly ◽  
Supramolecular Framework ◽  
Acid Base

A ‘Building Block’ Approach To Mixed-Colloid Systems Through Electrostatic Self-Organization

2001 ◽  
Vol 676 ◽  
Author(s):  
Trent H. Galow ◽  
Andrew K. Boal ◽  
Vincent M. Rotello
Keyword(s):  
Particle Size ◽  
Self Assembly ◽  
Building Block ◽  
Acid Base ◽  
Electrostatic Assembly ◽  
Polymer Colloid ◽  
Colloid Systems ◽  
Carboxylic Acid Derivative ◽  
Block Approach ◽  
Shape And Size

ABSTRACTWe have developed a highly modular electrostatically-mediated approach to colloid-colloid and polymer-colloid networks using ‘building block’ and ‘bricks and mortar’ self-assembly methodologies, respectively. The former approach involved functionalization of one type of nanoparticle building block with a primary amine and a counterpart building block with a carboxylic acid derivative. After combining these two systems, acid-base chemistry followed by immediate charge-pairing resulted in the spontaneous formation of electrostatically-bound mixed-nanoparticle constructs. The shape and size of these ensembles were controlled via variation of particle size and stoichiometries. In the ‘bricks and mortar’ approach, a functionalized polymer is combined with complementary nanoparticles to provide mixed polymer-nanoparticle networked structures. A notable feature is the inherent porosity resulting from the electrostatic assembly. The shape and size of these ensembles were controlled via variation of particle size, stoichiometries and the order in which they were added.

scholarly journals Nanostructure-directed chemical sensing: The IHSAB principle and the dynamics of acid/base-interface interaction

2013 ◽  
Vol 4 ◽  
pp. 20-31 ◽  
Author(s):  
James L Gole ◽  
William Laminack
Keyword(s):  
Metal Oxide ◽  
Self Assembly ◽  
Chemical Sensing ◽  
Optical Pumping ◽  
Relative Strength ◽  
Acid Base ◽  
Semiconductor Interfaces ◽  
Surface Basicity ◽  
Metal Oxide Sensors ◽  
Type Semiconductor

Nanostructure-decorated n-type semiconductor interfaces are studied in order to develop chemical sensing with nanostructured materials. We couple the tenets of acid/base chemistry with the majority charge carriers of an extrinsic semiconductor. Nanostructured islands are deposited in a process that does not require self-assembly in order to direct a dominant electron-transduction process that forms the basis for reversible chemical sensing in the absence of chemical-bond formation. Gaseous analyte interactions on a metal-oxide-decorated n-type porous silicon interface show a dynamic electron transduction to and from the interface depending upon the relative strength of the gas and metal oxides. The dynamic interaction of NO with TiO2, SnO2, NiO, Cu x O, and Au x O (x >> 1), in order of decreasing acidity, demonstrates this effect. Interactions with the metal-oxide-decorated interface can be modified by the in situ nitridation of the oxide nanoparticles, enhancing the basicity of the decorated interface. This process changes the interaction of the interface with the analyte. The observed change to the more basic oxinitrides does not represent a simple increase in surface basicity but appears to involve a change in molecular electronic structure, which is well explained by using the recently developed IHSAB model. The optical pumping of a TiO2 and TiO2− x N x decorated interface demonstrates a significant enhancement in the ability to sense NH3 and NO2. Comparisons to traditional metal-oxide sensors are also discussed.

Part III. The Respiratory Regulation in Psychotic Subjects

1928 ◽  
Vol 74 (306) ◽  
pp. 443-453 ◽  
Author(s):  
F. Golla ◽  
S. A. Mann ◽  
F. Golla ◽  
R. G. B. Marsh
Keyword(s):  
Organic Acid ◽  
Acid Production ◽  
Normal Subjects ◽  
Compensatory Mechanism ◽  
Acid Base ◽  
Organic Acid Production ◽  
Respiratory Regulation ◽  
Acid Base Equilibrium ◽  
Buffering Power ◽  
Respiratory Centre

The preceding studies on the acid-base equilibrium in psychotics have made it evident that the failure to adjust must be attributed in the first instance to an inadequacy of the respiratory compensatory mechanism, and can be in no sense attributable to either a deficiency in the buffering power of the blood itself or to an increased organic acid production (acidosis). We have endeavoured to determine the excitability of the respiratory centre to the stimulus created by CO2. For this purpose a number of psychotic patients were tested as to the excitability of the respiratory centre to air containing 2% CO2 and the reaction compared with that obtaining in a number of normal subjects.

scholarly journals Geometry-Wave Potential Quantified and Unified Properties in General Chemistry

2020 ◽  
Author(s):  
Zheng Tian
Keyword(s):  
General Chemistry ◽  
Surface Chemistry ◽  
Lewis Acid ◽  
Self Assembly ◽  
Redox Chemistry ◽  
Acid Base ◽  
Wave Potential ◽  
First Time

Many long-known but never-quantified properties in chapters of general chemistry have for the first time been quantitatively compared and consistently unified, using the newly introduced geometro-wave (GW) potential of particles (i.e. atoms, molecules, clusters, ions, and nanoparticles). Th GW Potential has helped update the electrochemistry, Lewis acid-base chemistry, redox chemistry, self-assembly, surface chemistry, catalysis, and inter-nanoparticle bonding.

scholarly journals Crystal engineered acid-base complexes with 2d and 3d hydrogen bonding systems using p-hydroxybenzoic acid as the building block

2010 ◽  
Vol 75 (4) ◽  
pp. 459-473 ◽  
Author(s):  
Pu Zhao ◽  
Xian Wang ◽  
Fang Jian ◽  
Jun Zhang ◽  
Lian Xiao
Keyword(s):  
Self Assembly ◽  
Building Block ◽  
Three Dimensional ◽  
Hydroxybenzoic Acid ◽  
Acid Base ◽  
3D Network ◽  
Acid And Base ◽  
Butyl Amine ◽  
Bonding Systems ◽  
Simply Connected

p-Hydroxybenzoic acid (p-HOBA) was selected as the building block for self-assembly with five bases, i.e., diethylamine, tert-butyl amine, cyclohexylamine, imidazole and piperazine, and generate the corresponding acid-base complexes 1-5. Crystal structure analyses suggest that proton-transfer from the carboxyl hydrogen to the nitrogen atom of the bases can be observed in 1-4; while only in 5 does a solvent water molecule co-exists with p-HOBA and piperazine. With the presence of O-H?O hydrogen bonds in 1-4, the deprotonated p-hydroxybenzoate anions (p-HOBAA-) are simply connected each other in a head-to-tail motif to form one-dimensional (1D) arrays, which are further extended to distinct two-dimensional (2D) (for 1 and 4) and three-dimensional (3D) (for 2 and 3 ) networks via N-H?O interactions. While in 5, neutral acid and base are combined pair wise by O-H?N and N-H?O bonds to form a 1D tape and then the 1D tapes are sequentially combined by water molecules to create a 3D network. Some interlayer or intralayer C-H?O, C-H?? and ??? interactions help to stabilize the supramolecular buildings. Melting point determination analyses indicate that the five acidbase complexes are not the ordinary superposition of the reactants and they are more stable than the original reactants.

scholarly journals Insight into the Ligand-Mediated Synthesis of Colloidal CsPbBr3 Perovskite Nanocrystals: The Role of Organic Acid, Base, and Cesium Precursors

ACS Nano ◽  
2016 ◽  
Vol 10 (8) ◽  
pp. 7943-7954 ◽  
Author(s):  
Aizhao Pan ◽  
Bo He ◽  
Xiaoyun Fan ◽  
Zeke Liu ◽  
Jeffrey J. Urban ◽  
...  
Keyword(s):  
Organic Acid ◽  
Acid Base ◽  
Perovskite Nanocrystals ◽  
Insight Into

Control of Self-Assembly by Acid-Base Chemistry

1995 ◽  
pp. 195-197
Author(s):  
R. M. Grotzfeld ◽  
N. R. Branda ◽  
C. Valdes ◽  
J. Rebek
Keyword(s):  
Self Assembly ◽  
Acid Base

Synthesis of CO2-responsive gradient copolymers by switchable RAFT polymerization and their controlled self-assembly

2020 ◽  
Vol 11 (42) ◽  
pp. 6794-6802
Author(s):  
Xiaofeng Guo ◽  
Tianren Zhang ◽  
Yuetong Wu ◽  
Wencheng Shi ◽  
Bonnie Choi ◽  
...  
Keyword(s):  
Self Assembly ◽  
Raft Polymerization ◽  
Good Control ◽  
Acid Base ◽  
Gradient Copolymers

Switchable RAFT agents, so-called because they can be reversibly switched by an acid/base stimulus to offer very good control over polymerization of both MAMs and LAMs, provide a route to prepare well-defined polyMAM-block-polyLAM copolymers.

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