Highly porous NiO microstructure for NO2 detection

Ambi, R.R.; Mane, A.A.; Tasgaonkar, R.D.; Mane, R.D.

doi:10.1016/j.physb.2023.415567

Cited by 4 publications

(1 citation statement)

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“…Nanomaterials based on NiO, a multi-functional p-type semiconductor with a wide band gap (3.5 eV) [1], have been the object of numerous studies in view of their various technological end-uses, among which are electrochromic devices [2][3][4][5][6][7], solar cells [8][9][10][11][12], gas sensors [13][14][15][16][17], and heterogeneous catalysts for a variety of processes [18][19][20][21][22][23][24][25][26]. This wide perspective of attractive utilization has triggered interest in their preparation by different strategies [1], among which sol-gel and chemical vapor deposition (CVD) [27][28][29], that are endowed with several degrees of freedom to tailor material structure, chemical composition, and morphology.…”

Section: Introductionmentioning

confidence: 99%

On the Fragmentation of Ni(II) β-Diketonate-Diamine Complexes as Molecular Precursors for NiO Films: A Theoretical and Experimental Investigation

Invernizzi,

Tabacchi,

Seraglia

et al. 2024

Molecules

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NiO-based nanomaterials have attracted considerable interest for different applications, which have stimulated the implementation of various synthetic approaches aimed at modulating their chemico-physical properties. In this regard, their bottom-up preparation starting from suitable precursors plays an important role, although a molecular-level insight into their reactivity remains an open issue to be properly tackled. In the present study, we focused on the fragmentation of Ni(II) diketonate-diamine adducts, of interest as vapor-phase precursors for Ni(II) oxide systems, by combining electrospray ionization mass spectrometry (ESI-MS) with multiple collisional experiments (ESI-MSn) and theoretical calculations. The outcomes of this investigation revealed common features in the fragmentation pattern of the target compounds: (i) in the first fragmentation, the three complexes yield analogous base-peak cations by losing a negatively charged diketonate moiety; in these cations, Ni-O and Ni-N interactions are stronger and the Ni positive charge is lower than in the parent neutral complexes; (ii) the tendency of ligand electronic charge to migrate towards Ni further increases in the subsequent fragmentation, leading to the formation of a tetracoordinated Ni environment featuring an interesting cation-π intramolecular interaction.

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