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Exploitation of molecular mobilities...

Gray, Tomoko O.

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Exploitation of molecular mobilities for advanced organic optoelectronic and photonic nano-materials.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Exploitation of molecular mobilities for advanced organic optoelectronic and photonic nano-materials./
作者:	Gray, Tomoko O.
面頁冊數:	119 p.
附註:	Adviser: Rene M. Overney.
Contained By:	Dissertation Abstracts International68-05B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3265342
ISBN:	9780549044666

Exploitation of molecular mobilities for advanced organic optoelectronic and photonic nano-materials.
Gray, Tomoko O.

Exploitation of molecular mobilities for advanced organic optoelectronic and photonic nano-materials. - 119 p.

Adviser: Rene M. Overney.

Thesis (Ph.D.)--University of Washington, 2007.

Electro-optically active organic materials have shown great potential in advanced technologies such as ultrafast electro-optical switches for broadband communication, light-emitting diodes, and photovoltaic cells. Currently, the maturity of chemical synthesis enables a sophisticated integration of the active elements into complex macromolecules. Also, the structure-property relationships of the isolated single electrically/optically active elements are well established. Unfortunately, such correlations involving single molecule are not applicable to complex unstructured condensed systems, in which unique mesoscale properties and complex dynamics of super-/supra-molecular structures are present. Our current challenge arises, in particular, from a deficiency of appropriate characterization tools that close the gap between phenomenological measurements and theoretical models.

ISBN: 9780549044666Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Exploitation of molecular mobilities for advanced organic optoelectronic and photonic nano-materials.
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245 1 0 $a Exploitation of molecular mobilities for advanced organic optoelectronic and photonic nano-materials.
300 $a 119 p.
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500 $a Source: Dissertation Abstracts International, Volume: 68-05, Section: B, page: 3082.
502 $a Thesis (Ph.D.)--University of Washington, 2007.
520 $a Electro-optically active organic materials have shown great potential in advanced technologies such as ultrafast electro-optical switches for broadband communication, light-emitting diodes, and photovoltaic cells. Currently, the maturity of chemical synthesis enables a sophisticated integration of the active elements into complex macromolecules. Also, the structure-property relationships of the isolated single electrically/optically active elements are well established. Unfortunately, such correlations involving single molecule are not applicable to complex unstructured condensed systems, in which unique mesoscale properties and complex dynamics of super-/supra-molecular structures are present. Our current challenge arises, in particular, from a deficiency of appropriate characterization tools that close the gap between phenomenological measurements and theoretical models.
520 $a This work addresses submolecular mobilities relevant for opto-electronic functionalities of photoluminescent polymers and non-linear optical (NLO) materials. Thereby, I will introduce novel nanoscale thermomechanical characterization tools that are based on scanning force microscopy. From nanoscale thermomechanical measurements sub-/super-molecular mobilities of novel optoelectronic materials can be inferred and to some degree controlled. For instance, we have explored interfacial constraints as a engineering tool to control molecular mobility. This will be illustrated with electroluminescent polymers, which are prone to undesired pi-pi aggregation due to the rod-like structure---intrinsic to all conjugated polymers. The nanoscale confinement is used to reduced chain mobility, and thus, hinders undesired aggregation, and consequently, yields superior spectral stability. From the nanomaterial design perspective, I will also address mobility control with targeted molecular designs. This involves two classes of novel NLO materials, side-chain dendronized polymers and self-assembling molecular glasses. The side-chain dendronized polymers are, due to the structural complexity, self-constrained systems. Our thermomechanical investigations identified that a local relaxation mode associated to the NLO side-chain is the critical design parameter in yielding high mobility to the active element. Relaxation processes of the self-assembling molecular glasses are discussed from a thermodynamic perspective involving both enthalpic and entropic contributions, considering the very special nature of interactions for the NLO molecular glasses, i.e., the formation and dissociation of phenyl/perfluorophenyl quadrupol pairs.
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650 4 $a Engineering, Materials Science. $3 1017759
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710 2 $a University of Washington. $3 545923
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790 $a 0250
790 1 0 $a Overney, Rene M., $e advisor
791 $a Ph.D.
792 $a 2007
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