There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

Signaling Recognition Events with Fluorescent Sensors and Switches.

6. Rehybridization of the Acceptor (RICT) 3908 7. Planarization of the Molecule (PICT) 3909 III. Fluorescence Spectroscopy 3909 A. Solvent Effects and the Model Compounds 3909 1. Solvent Effects on the Spectra 3909 2. Steric Effects and Model Compounds 3911 3. Bandwidths 3913 4. Isoemissive Points 3914 B. Dipole Moments 3915 C. Radiative Rates and Transition Moments 3916 1. Quantum Yields and Radiationless Deactivation Processes 3916

Structural Changes Accompanying Intramolecular Electron Transfer: Focus on Twisted Intramolecular Charge-Transfer States and Structures

Design principles of fluorescent molecular sensors for cation recognition

https://doi.org/10.1016/j.idcr.2022.e01412

High doses of favipiravir in two men survivors of Ebola virus disease carrying Ebola virus in semen in Guinea

Ab initio computations within the density functional theory arereported for the spin cross-over complex, [Fe(btz) 2 (NCS) 2 ], where 3d 6 Fe II is characterized by High Spin (HS t 42g , e 2g ) and Low Spin (LSt 62g , e 0g ) states. Results of infra red and Raman spectra for the iso-lated molecule are complemented for the crystalline solid with a fullaccount of the electronic band structure properties: the density ofstates assessing the crystal ﬁeld eﬀects and the chemical bonding as-signing a speciﬁc role to the Fe-N interaction within the coordinationsphere of Fe II . 1 Introduction Few inorganic transition metal ion complexes have the possibility of exhibit-ing two electronic states of d electrons, the High Spin (HS) and Low Spin(LS). Switching between these two states is subjected to small energy mag-nitudes around ∼ k BT and the transitions can be achieved with externalconstraints such as temperature, pressure as well as by applying light. Suchspin cross-over (SCO) behaviour has been discussed in detail in several re-views [1, 2, 3, 4]. Theoretical studies at the molecular level [5, 6] are equallyavailable but to our knowledge there are no solid state investigations of theelectronic structure for the whole crystal system. Such studies are likely toprovide further information on the changes of the electronic density of statesas well as on the chemical bonding in the close neighbourhood of centralFe ion. The purpose of this work is to provide spectroscopic and electronicstructure information on SCO system [Fe(btz)

Ab initio molecular and solid state studies of Fe$^{II}$ spin cross-over system [Fe(btz)$_2$(NCS)$_2$

We use a spin crossover material as active defect inserted into a periodic structure of alternating layers of glass and air. By inducing the spin transition of the defect, a single defect mode of this Bragg filter designed for the submillimeter wavelength can be tuned over 15 GHz. This shows prospective applications of spin crossover materials at terahertz frequencies.

Tunable photonic crystals controlled by spin-crossover material in Terahertz range

We investigated the thermo- and photo-induced phase transitions between low spin (LS) and high spin (HS) states of the molecular crystal of [Fe(PM-BiA)2(NCS)2] in the orthorhombic form, by using X-ray diffraction. The structure of the photoinduced HS state, generated from the LS state at low temperature, is compared to the structures of the HS and LS phases at thermal equilibrium and to the thermally trapped HS state. The preliminary results presented here show that the structural reorganization is similar in the different HS states.

Structural Investigation of the Photoinduced Spin Transition in the [Fe(PM-BiA)2(NCS)2] Compound

We have measured the evolution of the THz spectrum of polymeric iron(II) spin crossover compounds within the Low-Spin/High-Spin thermal hysteresis loop in the ∼0.6–6 THz frequency range. This study enabled to evidence the large variations of both the refractive optical index and the absorption that occur during the spin state phase transition.

Jean-François Létard

Papers

High doses of favipiravir in two men survivors of Ebola virus disease carrying Ebola virus in semen in Guinea

Ab initio molecular and solid state studies of Fe$^{II}$ spin cross-over system [Fe(btz)$_2$(NCS)$_2$

Tunable photonic crystals controlled by spin-crossover material in Terahertz range

Structural Investigation of the Photoinduced Spin Transition in the [Fe(PM-BiA)2(NCS)2] Compound

Time-domain spectroscopy of spin state transition in polymeric spin crossover compounds