| DC 欄位 |
值 |
語言 |
| DC.contributor | 化學學系 | zh_TW |
| DC.creator | 李函穎 | zh_TW |
| DC.creator | Han-Ying Li | en_US |
| dc.date.accessioned | 2021-7-19T07:39:07Z | |
| dc.date.available | 2021-7-19T07:39:07Z | |
| dc.date.issued | 2021 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=108223029 | |
| dc.contributor.department | 化學學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 本論文利用高溫高壓水熱合成法
及 中溫水熱合成法分別合成兩個
新穎的化合物 Ba3PbTe6O16 (BPTO)、 Na2Pb9( 66-O)2(Te2O10)2 (
這兩個化合物皆藉由單晶 X光繞射方法分析化合物的晶體結構，再以
粉末 X光繞射分析圖，確定樣品純度，並用 EDS確定化合物元素組成，
更進一步 以 XPS來確定碲金屬離子的價數。 BPTO空間群為 R-3屬於
中心對稱，結構中每 六 個蹺蹺板型的 TeO4 單元會與水平面上的 O(3)或 O(4)共角連接，沿著 ab平面形成六圓環的層狀結構，在六圓環結構
中，相鄰的 TeO4 單元其孤對電子朝向三個不同方向，並由鉛二正 離子
和鋇二正離子作為層與層之間的連接，形成三維網狀結構 。 NPTO空
間群為 Cmcm，結構中兩個 Te6+O6 多面體以共邊方式連接形成 Te2O10 二聚體 (dimer)並與 O@Pb5Na團簇上的鉛二正離子共享氧原子以共角
方式連接形成三維的網狀結構。 (O@Pb5Na表示一個 O2- 陰離子作為團
簇中心與五個 Pb2+ 和一個 Na+ 形成六配位八面體的團簇構型 )。在碲
酸鹽文獻中， BPTO結構中的六圓環無限延伸層和 NPTO結構中以 O2- 陰離子為團簇中心所形成的 O@Pb5Na團簇構型 皆 是十分稀有特別的
結構，因此利用高溫高壓水熱法和中溫水熱法 兩種合成方法有助於 新
穎結構化合物 的 生成 。 | zh_TW |
| dc.description.abstract | This thesis reports two novel lead-tellurium-oxygen compounds, Ba3PbTe6O16 (BPTO) and Na2Pb9( 66-O)2(Te2O10)2 (NPTO), were synthesized under hydrothermal conditions at 560 and 210℃℃, respectively. The crystal structures of the compounds are analyzed by the single crystal X-ray diffraction method. The powder X-ray diffraction analysis datas are used to determine the purity of the samples. The element compositions of the compounds are determined by EDS. And XPS is further measured to determine the valence of the tellurium metal ion. The space group of BPTO is the centrosymmetric R3. The six-membered rings along the ab plane in the structure of BPTO every six seesaw-shaped TeO4 unit connects with O(3) or O(4) by sharing corner. The adjacent TeO4 units in the six-membered rings with lone pairs electrons force the seesaw-shaped TeO4 units toward three different directions, and the Ba2+ and Pb2+ cations are situated in the interlayer region forms a three-dimensional network structure. The space group of NPTO is Cmcm contains dimers of edge-sharing Te6+O6 octahedra, which are connected through five coordinate Pb2+ cations. A unique six-coordinate O atom is at the center of the octahedron formed by five Pb2+ and one Na+ cations. (O@Pb5Na represents an O2- anion as the cluster center and five Pb2+ and one Na+ to form a six-coordinate octahedral cluster configuration). In the tellurite literatures, the six-membered rings infinitely extended layer in the structure of the BPTO and the O@Pb5Na cluster configuration formed by the O2- anion as the cluster center in the structure of the NPTO are very rare and special structures. In other words, it is a very good strategy to synthesize novel structural compounds by hydrothermal method. | en_US |
| DC.subject | 非線性光學 | zh_TW |
| DC.subject | 碲酸鹽 | zh_TW |
| DC.subject | nonlinear optical | en_US |
| DC.title | 利用水熱法合成含鉛碲(IV, VI)酸鹽化合物並鑑定之晶體結構 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Hydrothermal Synthesis and Crystal Structures of Lead Tellurium(IV, VI) Oxycompounds | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |