Structural, magnetic and Mössbauer spectroscopic studies of the [Fe(3-bpp)2](CF3COO)2 complex: role of crystal packing leading to an incomplete Fe(ii) high spin ⇋ low spin transition

CrystEngComm ◽  
2021 ◽  
Vol 23 (15) ◽  
pp. 2854-2861
Author(s):  
Kristian Handoyo Sugiyarto ◽  
Djulia Onggo ◽  
Hiroki Akutsu ◽  
Varimalla Raghavendra Reddy ◽  
Hari Sutrisno ◽  
...  
Keyword(s):  
High Spin ◽  
Crystal Packing ◽  
Spin Transition ◽  
Spectroscopic Studies ◽  
Mononuclear Complex

Mononuclear complex [Fe(3-bpp)2](CF3COO)2 exhibits a thermal (HS + HS) ⇋ (HS + LS) transition at ∼226 K which is not associated with any crystallographic transition.

Bias induced spin transitions of spin crossover molecules: the role of charging effect

2017 ◽  
Vol 19 (11) ◽  
pp. 7652-7658 ◽  
Author(s):  
Hua Hao ◽  
Ting Jia ◽  
Xiaohong Zheng ◽  
Zhi Zeng
Keyword(s):  
High Spin ◽  
Spin Crossover ◽  
Spin Transition ◽  
Charging Effect ◽  
Spin Transitions

A new mechanism is proposed to understand the recently observed spin transition of spin crossover molecules from low spin to high spin under bias voltages and it is closely related to one additional electron on the spin crossover molecules.

Evidence for high-spin-to-low-spin transition under pressure in Fe 72 Pt 28 Invar alloy

2000 ◽  
Vol 80 (2) ◽  
pp. 155-163 ◽  
Author(s):  
S. Odin, F. Baudelet, E. Dartyge, J. P
Keyword(s):  
High Spin ◽  
Spin Transition ◽  
Invar Alloy

scholarly journals Experimental and Theoretical Studies of Sonically Prepared Cu–Y, Cu–USY and Cu–ZSM-5 Catalysts for SCR deNOx

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 824
Author(s):  
Przemysław J. Jodłowski ◽  
Izabela Czekaj ◽  
Patrycja Stachurska ◽  
Łukasz Kuterasiński ◽  
Lucjan Chmielarz ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Ultrasonic Irradiation ◽  
Active Phase ◽  
Spectroscopic Studies ◽  
In Situ Drifts ◽  
Ft Ir ◽  
Diffuse Reflectance Infrared ◽  
Experimental And Theoretical Studies

The objective of our study was to prepare Y-, USY- and ZSM-5-based catalysts by hydrothermal synthesis, followed by copper active-phase deposition by either conventional ion-exchange or ultrasonic irradiation. The resulting materials were characterized by XRD, BET, SEM, TEM, Raman, UV-Vis, monitoring ammonia and nitrogen oxide sorption by FT-IR and Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). XRD data confirmed the purity and structure of the Y/USY or ZSM-5 zeolites. The nitrogen and ammonia sorption results indicated that the materials were highly porous and acidic. The metallic active phase was found in the form of cations in ion-exchanged zeolites and in the form of nanoparticle metal oxides in sonochemically prepared catalysts. The latter showed full activity and high stability in the SCR deNOx reaction. The faujasite-based catalysts were fully active at 200–400 °C, whereas the ZSM-5-based catalysts reached 100% activity at 400–500 °C. Our in situ DRIFTS experiments revealed that Cu–O(NO) and Cu–NH3 were intermediates, also indicating the role of Brønsted sites in the formation of NH4NO3. Furthermore, the results from our experimental in situ spectroscopic studies were compared with DFT models. Overall, our findings suggest two possible mechanisms for the deNOx reaction, depending on the method of catalyst preparation (i.e., conventional ion-exchange vs. ultrasonic irradiation).

High Spin-Low Spin Transition in MnAs1-xPx(x=0.075)

1977 ◽  
Vol 42 (1) ◽  
pp. 31-35 ◽  
Author(s):  
Satoshi Haneda ◽  
Noriaki Kazama ◽  
Yasuo Yamaguchi ◽  
Hiroshi Watanabe
Keyword(s):  
High Spin ◽  
Spin Transition

scholarly journals Role of theZ= 64 Core Excitation in High-Spin Isomers in Proton-RichN∼82 Nuclei

2002 ◽  
Vol 146 ◽  
pp. 595-596 ◽  
Author(s):  
Takayuki Matsuzawa ◽  
Hitoshi Nakada ◽  
Kengo Ogawa
Keyword(s):  
High Spin ◽  
Core Excitation ◽  
Spin Isomers

The antifungal factors in barley. IV. Isolation, structure, and synthesis of the hordatines

1967 ◽  
Vol 45 (15) ◽  
pp. 1745-1760 ◽  
Author(s):  
A. Stoessl
Keyword(s):  
Oxidative Coupling ◽  
Degradation Products ◽  
Spectroscopic Studies

Careful fractionation of extracts prepared from barley coleoptiles gave small amounts of pure hordatines A and B and substantial amounts of a mixture of their glucosides. The structures of the hordatines were deduced by degradative and spectroscopic studies and by the synthesis of some degradation products. A synthesis of racemic hordatine A analogous to its probable biogenesis was achieved by the oxidative coupling of coumaroylagmatine.The possible role of the hordatines in lignification is briefly discussed.

Electron spin resonance and Moessbauer study of the high-spin-low-spin transition in [Fe(phen)2(NCS)2] and [Fe(pic)3]Cl2.EtOH

1981 ◽  
Vol 20 (1) ◽  
pp. 204-207 ◽  
Author(s):  
P. Sambasiva. Rao ◽  
Amikam. Reuveni ◽  
Bruce R. McGarvey ◽  
Prabuddha. Ganguli ◽  
Philipp. Guetlich
Keyword(s):  
Electron Spin Resonance ◽  
High Spin ◽  
Electron Spin ◽  
Spin Transition ◽  
Spin Resonance
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