DSpace 集合:http://scholars.ntou.edu.tw/handle/123456789/2052024-03-28T23:36:08Z2024-03-28T23:36:08ZHighly selective Cu<SUP>2+</SUP> detection with a naphthalimide-functionalised pillar[5]arene fluorescent chemosensorChang, RongChen, Chan-YuGao, LiyaLi, YanaLee, Zui-HarngZhao, HongxiaSue, Andrew C. -H.Chang, Kai-Chihttp://scholars.ntou.edu.tw/handle/123456789/246732024-03-06T01:10:04Z2023-01-01T00:00:00Z標題: Highly selective Cu<SUP>2+</SUP> detection with a naphthalimide-functionalised pillar[5]arene fluorescent chemosensor
作者: Chang, Rong; Chen, Chan-Yu; Gao, Liya; Li, Yana; Lee, Zui-Harng; Zhao, Hongxia; Sue, Andrew C. -H.; Chang, Kai-Chi
摘要: Ligand 1, a rim-differentiated pillar[5]arene macrocycle modified with five naphthalimide groups through click chemistry, serves as an effective ratiometric fluorescent chemosensor for Cu2+. In contrast to the monomeric naphthalimide control compound 2, which shows only monomer emission, ligand 1 demonstrates dual emission characteristics encompassing both the monomer and excimer of the naphthalimide moieties. The binding properties of ligand 1 toward 15 different metal ions were systematically investigated in CH2Cl2/CH3CN (v/v, 1 : 1) by UV-vis and fluorescence spectroscopy. Remarkably, ligand 1 exhibits exceptional selectivity for Cu2+ ions. Upon complexation with Cu2+, the excimer emission of ligand 1 diminishes, concomitant with an enhancement of its monomer emission. The binding ratio for 1<middle dot>Cu2+ was determined to be 1 : 1, with an association constant of (3.39 +/- 0.40) x 10(5) M-1 calculated using a nonlinear least-squares curve-fitting method. Furthermore, the limit of detection (LOD) was found to be 185 +/- 7 nM. Our results from H-1 NMR titration, high-resolution mass spectrometry analysis and density functional theory calculations of 1<middle dot>Cu2+ suggest synergistic coordination between Cu2+ and the triazole groups on ligand 1.2023-01-01T00:00:00ZSmart city branding vision: multiple stakeholder perspectivesWang, Hui-Juhttp://scholars.ntou.edu.tw/handle/123456789/246302024-03-05T07:53:26Z2023-01-01T00:00:00Z標題: Smart city branding vision: multiple stakeholder perspectives
作者: Wang, Hui-Ju
摘要: City governments around the world are becoming smarter to enhance the quality of life of residents and the sustainability of the city. Becoming smart provides an opportunity to gain competitive advantages for cities by developing their identity as a smart city brand. To successfully brand a smart city, a smart city vision that incorporates the perspectives of different stakeholders can provide a useful basis for developing brand positioning strategies. This study aims to explore a smart city branding vision from the perspectives of multiple stakeholders. The study constructs and analyzes the vision maps of a smart city brand for user innovators (n = 224) and end users (n = 716) in Taiwan through surveys and network analysis. The results reveal a vision map with thirty-one elements for the two groups, consisting of seven core elements and twenty-four peripheral elements. Compared to end users, user innovators have more vision associations with a smart city brand. Additionally, the two groups share four core vision elements: smart pay, smart traffic, sound information infrastructure, and smart education. This study provides researchers with different approaches to understanding city branding vision and provides city managers with a valuable reference while designing city services and devising branding strategies for smart cities.2023-01-01T00:00:00ZStructural Variants and Ultralow Detection Ability for Tryptamine in Two Polymorphs of a Zincophosphite FrameworkYin, Mu-ChienWei, Pi-ChenLi, YingHsu, ToddJian, Jia-YiChang, Kai-ChiLu, Ching-PingTu, Hsiung-LinWang, Chih-Minhttp://scholars.ntou.edu.tw/handle/123456789/245762024-03-04T08:53:21Z2023-10-23T00:00:00Z標題: Structural Variants and Ultralow Detection Ability for Tryptamine in Two Polymorphs of a Zincophosphite Framework
作者: Yin, Mu-Chien; Wei, Pi-Chen; Li, Ying; Hsu, Todd; Jian, Jia-Yi; Chang, Kai-Chi; Lu, Ching-Ping; Tu, Hsiung-Lin; Wang, Chih-Min
摘要: Two organic-inorganic hybrid zinc phosphites incorporating 1,2,4,5-tetrakis(imidazol-1-ylmethyl)benzene (TIMB) molecules were synthesized under hydro(solvo)thermal methods and structurally characterized by single-crystal X-ray diffraction (SCXD). Interestingly, the solvent ratio of water to dimethylformamide induced the formation of a new compound of Zn-2(TIMB)(0.5)(HPO3)(2)<middle dot>3H(2)O (1) and our previously reported structure of Zn-2(TIMB)(0.5)(HPO3)(2)<middle dot>H2O (2). Additionally, their dehydrated crystals (1a and 2a) were prepared through heat treatment at 150 degrees C. SCXD and powder X-ray diffraction showed that all four compounds share the same framework formula of Zn-2(TIMB)(0.5)(HPO3)(2) but exhibit a huge difference in their inorganic components and final structures. In 1 and 1a, the inorganic units formed two-dimensional zincophosphite layers, while in 2 and 2a, they formed one-dimensional chains. The inorganic parts of 1 (1a) and 2 (2a) were bridged with TIMB linkers, resulting in 3D structures with rectangular and tubular windows, respectively. Furthermore, 1 was coated on the screen-printed carbon electron as a hybrid material, displaying excellent performance while having a linear relationship with an R-2 value of 0.99 within the concentration range of 10(-10) to 10(-6) mol/L for detecting tryptamine (Try) molecules. Moreover, the results showed that 1 exhibits an ultralow limit of detection of 5.43 x 10(-11) mol/L and high specificity toward Try over histamine, ascorbic acid, uric acid, and glucose. The synthesis, structural diversity, stability, and sensing ability are also discussed.2023-10-23T00:00:00ZCalix[4]arene-based Supramolecular Gels for Mercury Ion Removal in WaterChen, Tyng-RongChang, Kai-ChiChen, Chan-YuWu, Ting-WenLee, Li-WeiShen, Li-ChingChen, Hsin-NiChung, Wen-Shenghttp://scholars.ntou.edu.tw/handle/123456789/245502024-03-04T08:53:13Z2023-10-19T00:00:00Z標題: Calix[4]arene-based Supramolecular Gels for Mercury Ion Removal in Water
作者: Chen, Tyng-Rong; Chang, Kai-Chi; Chen, Chan-Yu; Wu, Ting-Wen; Lee, Li-Wei; Shen, Li-Ching; Chen, Hsin-Ni; Chung, Wen-Sheng
摘要: A calix[4]arene-based gelator 1, with lower-rim mono triazolylpyridine group, capable of spontaneous self-assembly into microspheres in different ethanol/H2O mixtures, is synthesized. The concentration-dependent H-1 NMR spectra and X-ray single-crystal structure of 1 provided evidence for self-assembly of gelator 1 via cooperative interactions of intermolecular noncovalent forces. Furthermore, metallogels by self-assembly of 1 was found to exhibit remarkable selectivity toward Hg2+ ions. H-1 NMR spectra support that Hg2+ ion was bound to the nitrogen atoms of two coordination sites of 1, which composed of triazole and pyridine. Moreover, the results of field emission scanning electron microscopy and rheology experiments indicated that Hg2+ ions not only enhanced the gelling ability of gelator 1 in ethanol but also led to morphological change of its self-assembly through metal-ligand interactions. Finally, the in situ gelation, triggered by mixing a gelator solution of 1 in ethanol with water samples such as deionized (DI), tap, and lake water, leads to the effective removal of Hg(II) from a water sample which reduced from 400 to 1.6 ppm.2023-10-19T00:00:00Z