Crown-ether-substituted asymmetric phthalocyanine derivatives/CdS self-assembled hybrid films with an unprecedented high response toward NO2
| العنوان: | Crown-ether-substituted asymmetric phthalocyanine derivatives/CdS self-assembled hybrid films with an unprecedented high response toward NO2 |
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| المؤلفون: | Yanli Chen, He Runna, Qiqi Sun, Chaoyi Yang, Jianzhuang Jiang |
| المصدر: | Journal of Porphyrins and Phthalocyanines. 23:507-517 |
| بيانات النشر: | World Scientific Pub Co Pte Lt, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | chemistry.chemical_classification, chemistry.chemical_compound, chemistry, Polymer chemistry, Amphiphile, Phthalocyanine, Alkoxy group, General Chemistry, Crown ether, Phthalocyanine derivatives, Self assembled |
| الوصف: | Two asymmetrical amphiphilic phthalocyanines simultaneously containing hydrophobic alkoxy and hydrophilic 15-crown-5-ether substituents at the phthalocyanine periphery H2{Pc(15C5)3[(OC8H[Formula: see text]]}(Pc-1) and H2{Pc(15C5)[(OC8H[Formula: see text]]}(Pc-2) and their symmetrical analogue H2[Pc(OC8H[Formula: see text]] (Pc-3) have been synthesized and characterized. The Pc-n/CdS ([Formula: see text] 1, 2 and 3, respectively) hybrid films are obtained successfully via a simple quasi-Langmuir–Shäfer (QLS) method using H2S-vapor annealing over the Pc-n/Cd[Formula: see text] self-assembled film formed at the interface of the air/CdCl2 aqueous solution. The film-structure and properties of both the hybrid Pc-n/CdS and pure Pc-n films are comparatively studied by a wide range of methods including UV-vis, polarized UV-vis, XRD, SEM and I–V measurements. Experimental results exhibit a slipped co-facial stacking mode in an “edge-on” conformation ([Formula: see text]-type aggregate) formed for the phthalocyanine molecules in both pure Pc-n films and the corresponding Pc-n/CdS hybrid films, with increasing intermolecular [Formula: see text]–[Formula: see text] interactions in the order of Pc-n 2 in the 0.05–2.5 ppm range within a fast dynamic exposure period of 30 s. Strikingly, Pc-1/CdS hybrid film presents an unprecedented high sensitivity of 157.3%.ppm[Formula: see text] vs. very low NO2 concentration range of 0.05˜0.25 ppm, achieving one of the best room temperature sensing performances in terms of high sensitivity, rapid responsibility and low detection limit among self-assembled film-based NO2 sensors. |
| تدمد: | 1099-1409 1088-4246 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::48de32c9aab69493d03fd8bb23caa2faTest https://doi.org/10.1142/s1088424619500391Test |
| رقم الانضمام: | edsair.doi...........48de32c9aab69493d03fd8bb23caa2fa |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10991409 10884246 |
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