1. 5-(3-Methoxy-pheneth-yl)-4-(2-methoxy-phen-yl)-4H-1,2,4-triazol-3-ol
Muhammad Hanif, Ghulam Qadeer, Nasim Hasan Rama, Wai-Yeung Wong Acta Crystallogr Sect E Struct Rep Online. 2008 Oct 25;64(Pt 11):o2180. doi: 10.1107/S1600536808033990.
In the mol-ecule of the title compound, C(18)H(19)N(3)O(3), the triazole ring is oriented with respect to the 3-methoxy-phenyl and 2-methoxy-phenyl rings at dihedral angles of 11.79 (3) and 89.22 (3)°, respectively. The dihedral angle between the two benzene rings is 85.95 (3)°. In the crystal structure, inter-molecular O-H⋯N and C-H⋯O hydrogen bonds link the mol-ecules. There is a π-π contact between the triazole and 3-methoxy-phenyl rings [centroid-centroid distance = 3.916 (3) Å]. There is a π-π contact between the triazole and one of the 3-methoxy-phenyl rings [centroid-centroid distance = 3.916 (3) Å ]. C-H⋯π contacts are also found between the benzene ring and the methyl groups of their 3-methoxy-substituents.
2. White-light emission in Yb3+/Er3+/Tm3+- and Yb3+/Er3+/Tm3+/Ho3+-doped α-NiMoO4nanoparticles
Schindra Kumar Ray, Bhupendra Joshi, Jin Hur Nanotechnology. 2022 Jul 8;33(39). doi: 10.1088/1361-6528/ac74cd.
Yb3+/Er3+/Tm3+- and Yb3+/Er3+/Tm3+/Ho3+-dopedα-NiMoO4nanoparticles were synthesized using a microwave hydrothermal method and studied for white-light emission under 980 nm laser diode excitation. White upconversion (UC) light was successfully obtained with the appropriate control of blue, green, and red emissions by successfully tuning the Er3+and Ho3+concentrations in Yb3+/Er3+/Tm3+- and Yb3+/Er3+/Tm3+/Ho3+-dopedα-NiMoO4, respectively. In addition, the white color emission was shown by the CIE chromaticity coordinates of samples. The energy transfer mechanisms are explained in detail based on the emission spectra and pump power density-dependent UC luminescence intensity in rare earth (Yb3+/Er3+/Tm3+and Yb3+/Er3+/Tm3+/Ho3+)-dopedα-NiMoO4nanoparticles. The results indicate that Yb3+/Er3+/Tm3+- and Yb3+/Er3+/Tm3+/Ho3+-dopedα-NiMoO4nanoparticles can be good candidates for white-light devices.
3. 3-(4-Fluoro-phenyl-sulfon-yl)-5-iodo-2,7-dimethyl-1-benzofuran
Pil Ja Seo, Hong Dae Choi, Byeng Wha Son, Uk Lee Acta Crystallogr Sect E Struct Rep Online. 2012 Jan;68(Pt 1):o96. doi: 10.1107/S1600536811052792. Epub 2011 Dec 10.
In the title compound, C(16)H(12)FIO(3)S, the 4-fluoro-phenyl ring makes a dihedral angle of 72.31 (6)° with the mean plane of the benzofuran fragment. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds, and by an I⋯I contact [3.7764 (3) Å]. The crystal structure also exhibits a weak C-I⋯π [3.901 (3) Å] inter-action and a slipped π-π inter-action between the furan and benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.845 (3), inter-planar distance = 3.555 (3) and slippage = 1.465 (3) Å].
