結晶的聚乳酸能有效地增強鄰近具有聚集誘導發光分子內限制轉動的能力，進而提高發光的效率。聚集誘導四苯基噻酚尾端基之聚乳酸立體錯合物具有結晶增強發光的性質。聚乳酸的放光主要為單體放光，其立體錯合物則有單體放光和激發二聚物放光。對於聚乳酸而言，熱退火可以增強單體放光，而熱退火對於其立體錯合物可以將單體放光轉換為很強的二聚物放光。在任何情況下，立體錯合物緊密堆積的晶體結構發光效率更高。
靜電紡絲技術可以簡易製備許多種類的高分子奈米纖維。羅丹明胼聚乳酸的奈米纖維藉由開環聚合左旋-丙交酯合成三臂高分子並且對酸鹼和錫金屬離子有高選擇性。奈米纖維在酸鹼值為 2 或12時有開/關特性。

Crystalline polylactide chains are efficient in imposing restricted intramolecular rotation on neighboring luminogens active in aggregation-induced emission (AIE) property, thereby increasing emission efficiency of the AIE-active luminogens (AIEgens). This crystallization-promoted emission enhancement (CPEE) behavior was demonstrated in the L- and D-polylactides (as TP-PLLA and TP-PDLA) terminated with an AIEgenic tetraphenylthiophene (TP) and in the stereocomplex (SC-PLA) from the stoichiometric mixture of TP-PLLA and TP-PDLA. Homopolylactides of TP-PLLA and TP-PDLA emit mainly with the monomer emission, in contrast, SC-PLA emits with both monomer and excimer emissions. Thermal annealing acted to enhance monomer emission of TP-PLLA and TP-PDLA but for the complex SC-PLA, thermal annealing converted the monomer emission into a large excimer emission. In any case, the intimately-packed crystalline structure of SC-PLA contributes to its high emission efficiency compared to the constituent TP-PLLA and TP-PDLA.
Electrospinning technique can process many kinds of continuous polymer fiber and it is very easy for process. Electrospun of rhodamine hydride PLA nanofiber was synthesized three armed polymer by ring opening polymerization of D-lactide and was highly selective for pH and tin ion. Nanofiber performances turn on/off properties in the condition of pH=2 or pH=12.

Outline of contents
Vertification letter from the Oral Examination Committee……………………………..i
Chinese Abstract.............................................…………………………………......…..ii
English Abstract...................................................………………………………….....iii
Outline of Contents...…………………….....………....………....…………....….…....v
List of Figure……………………………………………………………...…....….....vii
List of Scheme............................................................................................…..….........ix
List of Table...................................................................................................................ix
List of Supporting information…………………………………………………..…….x
1-1. Introduction……………………………...………………………………………..2
1-2. Experimental section……………………………...................................................6
1-3. Instrumentations………………………..................................................................8
1-4. Results and discussion……...................................................................................10
1-5. Conclusion…………………………………………………………………….…20
1-6. References …........................................................................................................29
1-7. Supporting information………………………………………………………….33
2-1. Introduction……………………………………………………………………...43
2-2. Experimental section…………………………………………………………….47
2-3. Instrumentations…………………………………………………………………50
2-4. Results and discussion……….……………………………….…….……………51
2-5. Conclusion…………………………………………………………………….…57
2-6. References …........................................................................................................70
2-7. Supporting information………………………………………………………….76

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