同步-导数固体基质室温磷光光谱法快速同时分析a-萘乙酸和6-苄氨基嘌呤

研究了植物激素α-萘乙酸和6-苄氨基嘌呤混合物体系的同步-导数固体基质室温磷光光谱. 在pH 9.5的条件下, 以1.5 mol/L的KI-CH3COOLi为重原子微扰剂, 选择Δλ=180 nm, 在240～340 nm的波长范围内对两者的混合物进行了同步磷光光谱扫描, 并做一阶导数处理. 结果表明, 二者的同步磷光光谱得到了较好的分离, 同步导数磷光峰分别位于257 nm和305 nm, 可同时分别对其进行定量分析. α-萘乙酸和6-苄氨基嘌呤的检出限分别为14.88 ng和6.75 ng. 方法可用于蔬菜中α-萘乙酸和6-苄氨基嘌呤的测定.     

同步-导数固体基质室温磷光光谱法快速同时分析α-萘乙酸和6-苄氨基嘌呤

研究了植物激素α-萘乙酸和6-苄氨基嘌呤混合物体系的同步一导数固体基质室温磷光光谱。在pH9．5的条件下,以1．5mol／L的KI-CH3COOLi为重原子微扰剂,选择Δλ=180nm,在240～340nm的波长范围内对两者的混合物进行了同步磷光光谱扫描,并做一阶导数处理。结果表明,二者的同步磷光光谱得到了较好的分离,同步导数磷光峰分别位于257nm和305nm,可同时分别对其进行定量分析。α-萘乙酸和6-苄氨基嘌呤的检出限分别为14．88ng和6．75ng。方法可用于蔬菜中α-萘乙酸和6-苄氨基嘌呤的测定。     

9-(4-溴丁基)-9H-咔唑的相转移催化合成、表征及室温磷光性能研究——推荐一个大学化学综合实验

推荐了一个大学化学综合实验"9-(4-溴丁基)-9H-咔唑的相转移催化合成、表征及室温磷光性能研究"。实验利用相转移催化合成9-(4-溴丁基)-9H-咔唑分子,采用核磁共振、高分辨质谱和红外光谱对其分子结构进行表征,并利用紫外-可见吸收光谱、稳态/瞬态荧光光谱和密度泛函(DFT)理论计算对其室温磷光性能进行研究。本综合实验涵盖了有机化学、分析化学、物理化学、仪器分析以及理论化学的知识点,建议纳入化学专业高年级综合实验课程。     

磷光邮票磷光带的测试

为了加速信函自动化分类工作,我国于1980及1982年分别发行了磷光邮票各一套。为了检查磷光邮票的质量,给分理机的设计部门提供参考数据,本实验用荧光分光光度计及其磷光测定附件,在室温对磷光邮票的磷光光谱特性和磷光强度进行了测试。     

室温磷光分析法的进展与应用

本文对近5年来国内外室温磷光法的研究进展进行了综述,包括固体基质室温磷光、表面活性剂有序介质增稳室温磷光、环糊精诱导室温磷光、敏化和猝灭室温磷光、无保护流体室温磷光、室温磷光化学传感器、生物大分子的室温磷光研究与应用,引用文献158篇.     

吩噻嗪类化合物的光谱特性及其在生物分析中的应用

研究了MV的流体荧光和固体基质室温磷光特性,并用光谱法初步探讨了MV与DNA的相互作用.     

β-环糊精存在下直链脂肪醇诱导1-溴萘室温磷光光谱研究

研究了β-环糊精（β-CD）溶液中直链脂肪醇（A）诱导1-溴萘（1-BrN）的室温磷光光谱性质．结果表明，三元包络物中1-BrN分子的磷光起初随醇中碳原子数的增加而增强，正戊醇对磷光呈现最大的敏化作用，随后从正己醇至正辛醇，磷光强度逐渐下降．测定了包络物组成和稳定常数，发现1-BfN和A：β-CD包络物的结合强度是三元包络物磷光强弱的决定性因素，并从三元包络物可能的结构解释了醇分子大小对室温磷光的影响．     

室温磷光凝胶研究进展

室温磷光(RTP)材料因其独特的发光性质和在光电、传感、生物成像及信息加密等领域广阔的应用前景吸引了研究者的兴趣。近年来,科学家探索了各种方法调控有机分子的室温磷光,并通过磷光分子结构设计以及磷光保护基质的构建成功构筑了长寿命和高量子效率的有机室温磷光材料。超分子凝胶作为诱导室温磷光的新基质,具有三维网络结构、热可逆性质及刺激响应性等优势而引起关注。本综述围绕无金属室温磷光凝胶材料和含金属室温磷光凝胶材料,总结了近年来关于室温磷光凝胶材料的研究现状,并在此基础上,简要展望了室温磷光凝胶材料研究的发展趋势。     

水介质钯卟啉室温磷光探针与小牛胸腺DNA作用的光谱特性

研究水溶性卟啉及其金属配合物与生物大分子 ,特别是核酸的相互作用方式对获得 DNA的碱基序列和识别 DNA的结构进而设计新型药物尤其是抗癌药物具有重要意义 [1] .近年来 ,采用电子吸收光谱、荧光光谱法和电化学技术研究卟啉与 DNA的相互作用多有报道 [2～ 4 ] ,磷光探针 [5]已成为探索有机介质中微环境性质或生物大分子如核酸和蛋白质的构型变化以及它们与药物作用机理的有力工具 .由于磷光具有更高的选择性 ,且与体系氧浓度密切相关 ,而生物分子在接近红外的长波长区几乎没有室温磷光发射 ,因此 ,寻找或合成一种在这一波段具有室温磷…     

β—环糊精存在下直链脂肪醇诱导1—溴萘室温磷光光谱研究

研究了β－环糊精溶液中直链脂肪醇诱导１－溴萘的室温磷光光谱性质。结果表明，三元包络物中１－ＢｒＮ分子的磷光起初随醇中碳原子数的增加而增强，正戊醇对磷光呈现最大的敏化作用，随后从正己醇至正辛醇，磷光强度逐渐下降，测定了包络物组成和稳定常数，发现１－ＢｒＮ和Ａ：β－ＣＤ包络物的结合强度是三元包络物磷光强弱的决定性因素，并从三元包络物可能的结构解释了醇分子大小对室温磷光的影响。     

The Effect of Molecular Conformations and Simulated “Self-Doping” in Phenothiazine Derivatives on Room-Temperature Phosphorescence

The research of purely organic room-temperature phosphorescence (RTP) materials has drawn great attention for their wide potential applications. Besides single-component and host–guest doping systems, the self-doping with same molecule but different conformations in one state is also a possible way to construct RTP materials, regardless of its rare investigation. In this work, twenty-four phenothiazine derivatives with two distinct molecular conformations were designed and their RTP behaviors in different states were systematically studied, with the aim to deeply understand the self-doping effect on the corresponding RTP property. While the phenothiazine derivatives with quasi-axial (ax) conformation presented better RTP performance in aggregated state, the quasi-equatorial (eq) ones were better in isolated state. Accordingly, the much promoted RTP performance was achieved in the stimulated self-doping state with ax-conformer as host and eq-one as guest, demonstrating the significant influence of self-doping on RTP effect.     

Carbon Dots with Dual-Emissive,Robust, and Aggregation-Induced Room-Temperature Phosphorescence Characteristics

Carbon dots (CDs) with dual-emissive, robust, and aggregation-induced RTP characteristics are reported for the first time. The TA-CDs are prepared via hydrothermal treatment of trimellitic acid and exhibit unique white prompt and yellow RTP emissions in solid state under UV excitation (365 nm) on and off, respectively. The yellow RTP emission of TA-CDs powder should be resulted from the formation of a new excited triplet state due to their aggregation, and the white prompt emission is due to their blue fluorescence and yellow RTP dual-emissive nature. The RTP emission of TA-CDs powder was highly stable under grinding, which is very rare amongst traditional pure organic RTP materials. To employ the unique characteristics of TA-CDs, advanced anti-counterfeiting and information encryption methodologies (water-stimuli-response producing RTP) were preliminarily investigated.     

Carbon Dots with Dual‐Emissive,Robust, and Aggregation‐Induced Room‐Temperature Phosphorescence Characteristics

Carbon dots (CDs) with dual‐emissive, robust, and aggregation‐induced RTP characteristics are reported for the first time. The TA‐CDs are prepared via hydrothermal treatment of trimellitic acid and exhibit unique white prompt and yellow RTP emissions in solid state under UV excitation (365 nm) on and off, respectively. The yellow RTP emission of TA‐CDs powder should be resulted from the formation of a new excited triplet state due to their aggregation, and the white prompt emission is due to their blue fluorescence and yellow RTP dual‐emissive nature. The RTP emission of TA‐CDs powder was highly stable under grinding, which is very rare amongst traditional pure organic RTP materials. To employ the unique characteristics of TA‐CDs, advanced anti‐counterfeiting and information encryption methodologies (water‐stimuli‐response producing RTP) were preliminarily investigated.     

Carbon dots confined in 3D polymer network: Producing robust room temperature phosphorescence with tunable lifetimes

Room temperature phosphorescence(RTP) is important in both organic electronics and encryption. Despite rapid advances, a universal approach to robust and tunable RTP materials based on amorphous polymers remains a formidable challenge. Here, we present a strategy that uses three-dimensional(3 D)confinement of carbon dots in a polymer network to achieve ultra-long lifetime phosphorescence. The RTP of the as-obtained materials was not quenched in different polar organic solvents and the lifetime o...     

Room-temperature phosphorimetry studies of some addictive drugs following dansyl chloride labelling

A room-temperature phosphorimetric (RTP) method for the analysis of barbital, codeine, morphine and practolol after labelling with dansyl chloride (DNS-Cl) is described. The drug-DNS derivatives were obtained by refluxing with drug-ethyl acetate solutions and solid DNS-Cl in the presence of anhydrous potassium carbonate. The reaction conditions were investigated in detail. The fluorescence emission of drug-DNS derivatives shifted to longer wavelengths compared with that of DNS-Cl. The RTP phenomena observed for these derivatives by using a micellar stabilized room-temperature phosphorescence technique were examined and optimum conditions for their RTP emission were studied using an orthogonal array design. Derivative RTP spectra were obtained and successfully used to determine practolol by the established method without further separation.     

Visible-light-excited long-lived organic room-temperature phosphorescence of phenanthroline derivatives in PVA matrix by H-bonding interaction for security applications

Organic room-temperature phosphorescence (RTP) materials are very attractive, but there is still a challenge to achieve RTP for their practical applications under visible light excitation (λ > 400 nm) because of the implement for the most organic RTP is under ultraviolet light. Herein, a simple tactics for inhibiting the vibrational dissipation of three amorphous phenanthroline derivatives by doping them into polyvinyl alcohol (PVA) matrix was utilized to afford visible-light excitation RTP. By using this method, on account of the mutual H-bonding and confinement effect with PVA matrix, a series of organic RTP materials with blue-green phosphorescence emission were obtained under visible-light excitation. The afterglow colors of RTP materials can be adjusted by co-doping the available fluorescence dyes (RhB or Rh6G) into the PVA films through a triplet-to-singlet Förster resonance energy transfer. However, the H-bonding is easily broken by water molecules resulting in the RTP phenomenon disappears. Hence, Aphen-epoxy resin composite system was constructed to overcome this drawback. It is shown that the composite still has good phosphorescence properties after soaking in water for 7 days. The superior RTP of the amorphous phenanthroline derivatives in processable polymer matrices endows these materials with a highly potential for the night warning clothing coating and information encryption.     

Fused-Ring Pyrrole-Based Near-Infrared Emissive Organic RTP Material for Persistent Afterglow Bioimaging

Organic near-infrared room temperature phosphorescence (RTP) materials offer remarkable advantages in bioimaging due to their characteristic time scales and background noise elimination. However, developing near-infrared RTP materials for deep tissue imaging still faces challenges since the small band gap may increase the non-radiative decay, resulting in weak emission and short phosphorescence lifetime. In this study, fused-ring pyrrole-based structures were employed as the guest molecules for the construction of long wavelength emissive RTP materials. Compared to the decrease of the singlet energy level, the triplet energy level showed a more effectively decrease with the increase of the conjugation of the substituent groups. Moreover, the sufficient conjugation of fused ring structures in the guest molecule suppresses the non-radiative decay of triplet excitons. Therefore, a near-infrared RTP material (764 nm) was achieved for deep penetration bioimaging. Tumor cell membrane is used to coat RTP nanoparticles (NPs) to avoid decreasing the RTP performance compared to traditional coating by amphiphilic surfactants. RTP NPs with tumor-targeting properties show favorable phosphorescent properties, superior stability, and excellent biocompatibility. These NPs are applied for time-resolved luminescence imaging to eliminate background interference with excellent tissue penetration. This study provides a practical solution to prepare long-wavelength and long-lifetime organic RTP materials and their applications in bioimaging.     

Long-lived room temperature phosphorescence of a naphthalene—β-cyclodextrin—adamantane complex in the presence of oxygen

Naphthalene-d₈—-cyclodextrin—adamantane triple complexes were prepared in an aqueous solution at room temperature. Irradiation ( = 285 nm) of the solution in the presence of molecular oxygen results in the long-lived ( = 10.3 s) room temperature phosphorescence (RTP). The removal of oxygen from the solution increases the RTP intensity and phosphorescence lifetime by 1.5 times. The RTP spectrum contains a well-resolved vibrational structure, whose bands are assigned to full symmetric vibrations of naphthalene, their overtones, and the combination tones of full symmetric vibrations. The quantum-chemical calculation of the triple complex structure confirms that both naphthalene and adamantane can simultaneously be included into the -cyclodextrin cavity and suggests that the role of the latter as the third component is the more efficient shielding of naphthalene from the oxygen effect due to both the formation of three-component complexes and their aggregation to form submicronic particles.     

溶胶-凝胶法制备ZrO2/SiO2纳米复合材料的研究

利用溶胶-凝胶法制备了ZrO2/SiO2纳米复合物室温磷光材料,通过各条件的优化,最终确定溶剂为异丙醇、Zr摩尔掺杂百分含量为15%、550℃下煅烧3h得到的纳米ZrO2/SiO2复合物的室温磷光发光性能较好,其最大激发波长为280nm、发射波长为460nm,且磷光寿命为0.56s。     

Recent Advances of Pure Organic Room Temperature Phosphorescence Materials for Bioimaging Applications

Bioimaging,as a powerful and helpful tool,which allows people to investigate deeply within living organisms,has contributed a lot for both clinical theranostics and scientific research.Pure organic room temperature phosphorescence(RTP)materials with the unique features of ultralong luminescence lifetime and large Stokes shift,can efficiently avoid biological autofluorescence and scattered light through a time-resolved imaging modality,and thus are attracting increasing attention.This review classifies pure organic RTP materials into three categories,including small molecule RTP materials,polymer RTP materials and supramolecular RTP materials,and summarizes the recent advances of pure organic RTP materials for bioimaging applications.