東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Designing Stimuli-Responsive Azo-Con...

Sambasivam, Uma.

Linked to FindBook

Google Book

Amazon

博客來

Designing Stimuli-Responsive Azo-Containing Metal-Organic Frameworks for Selective Gas Adsorption.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Designing Stimuli-Responsive Azo-Containing Metal-Organic Frameworks for Selective Gas Adsorption./
Author:	Sambasivam, Uma.
Description:	81 p.
Notes:	Source: Masters Abstracts International, Volume: 51-04.
Contained By:	Masters Abstracts International51-04(E).
Subject:	Inorganic chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1530345
ISBN:	9781267785053

Designing Stimuli-Responsive Azo-Containing Metal-Organic Frameworks for Selective Gas Adsorption.
Sambasivam, Uma.

Designing Stimuli-Responsive Azo-Containing Metal-Organic Frameworks for Selective Gas Adsorption. - 81 p.

Source: Masters Abstracts International, Volume: 51-04.

Thesis (M.S.)--University of South Dakota, 2012.

Metal-organic frameworks (MOFs) are hybrid crystalline materials made up of metal ions and organic ligands. MOFs have found a variety of potential applications, including gas storage, separation, catalysis, and drug delivery. A subset of MOFs has recently gained attention because of their guest-induced structural flexibility, which is highly relevant for gas separation applications (i.e., carbon dioxide capture). However, it has remained a challenge to modulate the flexible behavior in MOFs. This thesis focuses on the development of flexible MOFs based on specific functional group approach.

ISBN: 9781267785053Subjects--Topical Terms:

3173556
Inorganic chemistry.

Designing Stimuli-Responsive Azo-Containing Metal-Organic Frameworks for Selective Gas Adsorption.
LDR:04249nmm a2200325 4500 001 2069992
005 20160602092034.5
008 170521s2012 ||||||||||||||||| ||eng d
020 $a 9781267785053
035 $a (MiAaPQ)AAI1530345
035 $a AAI1530345
040 $a MiAaPQ $c MiAaPQ
100 1 $a Sambasivam, Uma. $3 3185006
245 1 0 $a Designing Stimuli-Responsive Azo-Containing Metal-Organic Frameworks for Selective Gas Adsorption.
300 $a 81 p.
500 $a Source: Masters Abstracts International, Volume: 51-04.
500 $a Adviser: Rick Wang.
502 $a Thesis (M.S.)--University of South Dakota, 2012.
520 $a Metal-organic frameworks (MOFs) are hybrid crystalline materials made up of metal ions and organic ligands. MOFs have found a variety of potential applications, including gas storage, separation, catalysis, and drug delivery. A subset of MOFs has recently gained attention because of their guest-induced structural flexibility, which is highly relevant for gas separation applications (i.e., carbon dioxide capture). However, it has remained a challenge to modulate the flexible behavior in MOFs. This thesis focuses on the development of flexible MOFs based on specific functional group approach.
520 $a A systematic overview of the flexible behavior of Azo-MOFs is presented to highlight the versatility of the azo-functional group approach to modulate the flexible behavior in MOFs. A series of azo-containing MOFs are synthesized from the one-pot solvothermal reaction of zinc nitrate, 1,4-benzene dicarboxylic acid (1,4-BDC) and 4,4'-azobipyridine (azpy) in different solvent systems such as N,N-dimethylformamide (DMF), N,N-diethylformamide (DEF), or N,N-dimethylacetamide (DMA) etc. These MOFs are fully characterized by single crystal X-ray crystallography, powder X-ray diffraction, thermo gravimetric analysis, and gas adsorption analysis. The crystal structure of Azo-MOFs is illustrated by a three-dimensional (3D) pillared lattice. They are constructed from rectangular or paddle wheel secondary building units that are equatorially co-ordinated by 1,4-BDC dianions to form two-dimensional (2D) square grids. 4,4'-Azobipyridine acts as a pillar ligand to extend the two-dimensional layers into a 3D structure. These MOFs incorporate the azo-group as part of the backbone of the MOF lattice. The flexible behavior of Azo-MOFs has been validated by stepwise adsorption isotherms and PXRD data of the dried samples. We have demonstrated that flexible behavior of Azo-MOFs is highly influenced by structural variation, interpenetration, solvent, carboxylate and azobipyridine linkers.
520 $a Most intriguingly, we have synthesized other Azo-MOFs based on different carboxylic acid system to validate the significance of carboxylate linker in flexible behavior. The gas adsorption studies of fumaric Azo-MOFs clearly exemplify the significance of carboxylate linker and the cavity size in flexible behavior.
520 $a Given the success with the identification of the azo-functionalized MOFs and their intriguing flexible behavior (vide infra), we have decided to evaluate the gas adsorption behavior of structurally related MOFs that lack azo functional groups. We have used 1,2-di(4-pyridyl)ethylene(bpe) ligand system to construct structurally related MOFs(Bpe-MOF). The comparative gas adsorption analysis of Azo-MOFs with that of Bpe-MOF further reveals the significance of the azo-group in modulating the flexibility of the MOFs.
520 $a These Azo-MOFs show selective carbon dioxide adsorption over nitrogen, due to their guest-induced flexible feature. These findings suggest that CO2 selectivity can be systematically manipulated through different strategies including suitable ligand design. Thus, Azo-MOFs are promising materials for efficient and cost effective carbon dioxide capture applications. We anticipate these novel findings will open up a new path for the design of future generations of stimuli-responsive porous materials.
590 $a School code: 0203.
650 4 $a Inorganic chemistry. $3 3173556
650 4 $a Organic chemistry. $3 523952
690 $a 0488
690 $a 0490
710 2 $a University of South Dakota. $b Chemistry. $3 1679392
773 0 $t Masters Abstracts International $g 51-04(E).
790 $a 0203
791 $a M.S.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1530345