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Part I: Self-assembling dendrimers ...

Ma, Yuguo.

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Part I: Self-assembling dendrimers using the DDA-AAD hydrogen bonding motif. Part II: Supramolecular discotic liquid crystals through hydrogen bond mediated self-assembly.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Part I: Self-assembling dendrimers using the DDA-AAD hydrogen bonding motif. Part II: Supramolecular discotic liquid crystals through hydrogen bond mediated self-assembly./
作者:	Ma, Yuguo.
面頁冊數:	128 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1250.
Contained By:	Dissertation Abstracts International64-03B.
標題:	Chemistry, Organic. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3086129

Part I: Self-assembling dendrimers using the DDA-AAD hydrogen bonding motif. Part II: Supramolecular discotic liquid crystals through hydrogen bond mediated self-assembly.
Ma, Yuguo.

Part I: Self-assembling dendrimers using the DDA-AAD hydrogen bonding motif. Part II: Supramolecular discotic liquid crystals through hydrogen bond mediated self-assembly. - 128 p.

Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1250.

Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.

In part I, a heterocyclic unit which contains complementary donor-donor-acceptor (DDA) and acceptor-acceptor-donor (AAD) (G·C-like) hydrogen bonding arrays at an angle of about 60° was used to self-assemble dendrimers into a hexamer. To investigate its ability to self-assemble higher generation dendrimers, second and third generation Frechet-type dendron were attached to the 8-amino group the 2,8-diamino-2-N-ethylpyrimido-(4,5- b)[1,8] naphthyridine-3H-4-one subunit. Studies using 1H NMR, size exclusion chromatography (SEC) and dynamic light scattering (DLS) support the cooperative formation of cyclic hexamers in apolar solvents. The stability of the self-assembled dendrimers is dependent on the size of the attached dendron. Pair-wise mixing studies with different generation dendritic monomers indicate their usefulness in constructing dynamic combinatorial libraries.Subjects--Topical Terms:

516206
Chemistry, Organic.

Part I: Self-assembling dendrimers using the DDA-AAD hydrogen bonding motif. Part II: Supramolecular discotic liquid crystals through hydrogen bond mediated self-assembly.
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245 1 0 $a Part I: Self-assembling dendrimers using the DDA-AAD hydrogen bonding motif. Part II: Supramolecular discotic liquid crystals through hydrogen bond mediated self-assembly.
300 $a 128 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1250.
500 $a Adviser: Steven C. Zimmerman.
502 $a Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.
520 $a In part I, a heterocyclic unit which contains complementary donor-donor-acceptor (DDA) and acceptor-acceptor-donor (AAD) (G·C-like) hydrogen bonding arrays at an angle of about 60° was used to self-assemble dendrimers into a hexamer. To investigate its ability to self-assemble higher generation dendrimers, second and third generation Frechet-type dendron were attached to the 8-amino group the 2,8-diamino-2-N-ethylpyrimido-(4,5- b)[1,8] naphthyridine-3H-4-one subunit. Studies using 1H NMR, size exclusion chromatography (SEC) and dynamic light scattering (DLS) support the cooperative formation of cyclic hexamers in apolar solvents. The stability of the self-assembled dendrimers is dependent on the size of the attached dendron. Pair-wise mixing studies with different generation dendritic monomers indicate their usefulness in constructing dynamic combinatorial libraries.
520 $a In part II, the ability of this heterocyclic unit to generate a self-assembled structure in bulk was tested by attachment of a 3,4,5-tris-dodecyloxybenzyl group to the 8-amino group and evaluating the mesomorphic properties of the resulting derivative. Cumulative solution studies by 1H NMR, SEC and DLS indicate the formation of a hydrogen bonded cyclic hexamer in apolar solvents. The studies by differential scanning calorimetry (DSC), polarized light microscopy (PLM) and X-ray diffraction (XRD) indicate that the hexameric disks can stack in bulk to form thermotropic columnar mesophases. The mesophases exist across a large temperature range (>248°C).
590 $a School code: 0090.
650 4 $a Chemistry, Organic. $3 516206
650 4 $a Chemistry, Polymer. $3 1018428
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791 $a Ph.D.
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