Room-temperature phosphorescence properties from cyclodextrin inclusion complexes in solutions

溶液中环糊精包合物的室温磷光特性

• 批准号: 09640592
• 负责人: HAMAI Sanyo
• 金额: $ 1.92万
• 依托单位: Akita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640592/
• 关键词: Cyclodextrins; Inclusion complexes; Room-temperature phosphorescence

At room temperature, phosphorescence from aromatic compounds in solutions cannot be usually observed. However, room-temperature phosphorescence (RTP) from a guest, which is located within a cyclodextrin (CD) inclusion complex, is frequently observed. Until now, beta- and gamma-CDs (derivatives) are known as CD inclusion complexes which emit RTP, except for alpha- CD-6-bromo-2-naphthol and alpha-CD-2-chloronaphthalene inclusion complexes. In the cases of beta- and gamma-CDs, an inclusion complex which contains a single CD molecule emits the RTP of a guest. With alpha-CD, on the other hand, a 2 : 1 a-CD-guest inclusion complex alone emits the RTP.Thus, we examined whether guests emit RTP within inclusion complexes with a-CD in solutions. As a result, we found that alpha-CD-3-bromoquinoline inclusion complex emit the RTP in solution, In the system of alpha-CD-3-bromoquinoline, a 1 : 1 and 2 : 1 alpha-CD-3-bromoquinoline inclusion complexes are confirmed. The formation constants for the inclusion complexes were determined.Iodine-substituted alpha-CD was synthesized to investigate the properties of the RTP of the brominated-alpha-CD-3-bromoquinoline inclusion complex. The RTP of brominated-alpha-CD inclusion complex is reduced about 18% compared to alpha-cyclodextrin. The RTP from beta-CD-naphthalene inclusion complex was observed in solution containing D-glucose ; the RTP quantum yield was evaluated to be 0.0022.

在室温下，通常不能观察到芳香族化合物在溶液中的磷光。然而，经常观察到来自位于环糊精（CD）包合物内的客体的室温磷光（RTP）。到目前为止，β-和γ-CD（衍生物）被称为CD包合复合物，其发射RTP，除了α- CD-6-溴-2-萘酚和α-CD-2-氯萘包合复合物。在β-和γ-CD的情况下，包含单个CD分子的包合复合物发射客体的RTP。另一方面，对于α-CD，2：1的α-CD-客体包合物单独发射RTP。因此，我们研究了客体在溶液中与α-CD的包合物内是否发射RTP。结果表明，α-CD-3-溴喹啉包合物在溶液中发射RTP，在α-CD-3-溴喹啉体系中，确定了1：1和2：1的α-CD-3-溴喹啉包合物。测定了包合物的形成常数，并合成了碘取代的α-CD，研究了溴化α-CD-3-溴喹啉包合物的RTP性质。溴化-α-CD包合物的RTP比α-环糊精降低约18%。在含有D-葡萄糖的溶液中观察到β-CD-萘包合物的RTP; RTP量子产率被评估为0.0022。

项目成果

Sabyo Hamai: "Fluorescence and phosphorescence properties of naphthalene in aqueous D-glucose solutions containing 6-deoxy-6-iodo-β-cyclodextrin at room..." Bull.Chem.Soc.Jpn.71. 1549-1554 (1998)

Sabyo Hamai：“室温下含有 6-脱氧-6-碘-β-环糊精的 D-葡萄糖水溶液中萘的荧光和磷光特性……”Bull.Chem.Soc.Jpn.71 (1998)。

Sanyo Hamai: "Room-temperature phosphorescence of guest molecules included by cyclodextrin in aqueous solutions" Recent Research Developments in Physical Chemistry. 1. 321-331 (1997)

Sanyo Hamai：“水溶液中环糊精包含的客体分子的室温磷光”物理化学的最新研究进展。

Sanyo Hamai: "Inclusion of 2-chloronaphthalene by α-cyclodextrin and room-temperature phosphorescence of 2-chloronaphthalene in aqueous D-glucose solutions..." J.Phys.Chem.B. 101. 1707-1712 (1997)

Sanyo Hamai：“通过 α-环糊精包含 2-氯萘以及 D-葡萄糖水溶液中 2-氯萘的室温磷光......”J.Phys.Chem.B. 101. 1707-1712 (1997)

Sanyo Hamai: "External heavy atom effects of 6-deoxy-6-iodo-α-cyclodextrin on the room-temperature phosphorescence of 6-bromo -2-naphthol and..." J.Photochem.Photobiol.A: chem.113. 135-140 (1998)

Sanyo Hamai：“6-脱氧-6-碘-α-环糊精对 6-溴-2-萘酚的室温磷光的外部重原子影响和......”J.Photochem.Photobiol.A：chem.113 .135-140 (1998)

Sanyo Hamai: "Fluorescence and phosphorescence properties of naphthalene in aqueous D-glucose solutions containing 6-deoxy-6-iodoーβ-cyclodextrin at room..." Bull.Chem.Soc.Jpn.71. 1549-1554 (1998)

Sanyo Hamai：“室温下含有 6-脱氧-6-碘-β-环糊精的 D-葡萄糖水溶液中萘的荧光和磷光特性……”Bull.Chem.Soc.Jpn.71 (1998)。