Structure of a Fe4O6-Heteraadamantane-Type Hexacation Stabilized by Chelating Organophosphine Oxide Ligands

Heteraadamantanes are compounds of interest due to their spectroscopic and magnetic properties, which make them promising materials for non-linear optics and semiconductors. Herein we report the comprehensive structural characterization of a new coordination compound of the formula [(µ-OH′)2(µ-OH″)4(O = P(Ph2)CH2CH2(Ph2)P = O)4{Fe(MeOH)}4](PF6)4(Cl)2 with the chelating ligand Ph2P(O)-CH2CH2-P(O)Ph2. The compound crystallizes as a polynuclear metal complex with the adamantane-like core [Fe4O6] in the space group I-43d of a cubic system. The single-crystal XRD analysis showed that the crystal contains one symmetrically independent octahedrally coordinated Fe atom in the oxidation state +3. The adamantine-like scaffold of the Fe complex is formed by hydroxy bridging oxygen atoms only. Hirshfeld surface analysis of the bridging oxygen atoms revealed two types of µ-OH groups, which differ in the degree of exposure and participation in long-range interactions. Additionally, the Hirshfeld surface analysis supported by the enrichment ratio calculations exhibited the high propensity of the title complex to form C-H…Cl, C-H…F and C-H…O interactions.

INTERNATIONAL E-CONFERENCE ON FRONTIERS OF ENERGY EFFICIENT MATERIALS AND DEVICES (ICEEMD-2021)

Thin Film Technology, Crystal Growth, Non-Linear Optics,Conducting Polymers, Nano Technology, Solar Cells, Molecular Quantum Mechanics and Ultrasonics are being carried out. So far, more than 300 M.Phil and 35 Ph.D degrees were awarded. The department has published more than 500 research papers in SCI indexed international journals.

How To Extend The Capabilities Of A Commercial Two-Photon Microscope To Perform Super-Resolution Imaging, Wavelength Mixing And Label-Free Microscopy.

Multimodal microscopy combines multiple non-linear techniques that take advantage of different optical processes to generate contrast and increase the amount of information that can be obtained from biological samples. However, the most advanced optical architectures are typically custom-made and require complex alignment procedures, as well as daily maintenance by properly trained personnel for optimal performance. Here, we describe a hybrid system we constructed to overcome these disadvantages by modifying a commercial upright microscope. We show that our multimodal imaging platform can be used to seamlessly perform two-photon STED, wavelength mixing and label-free microscopy in both ex vivo and in vivo samples. The system is highly stable and endowed with remote alignment hardware that ensures simplified operability for non-expert users. This optical architecture is an important step forward towards a wider practical applicability of non-linear optics to bioimaging.

Structural Variants of RM734 in the Design of Splay Nematic Materials

<p><b>Structural Variants of <i>RM734</i> in the Design of Splay Nematic Materials</b></p><p></p><p>The recent discovery of the splay nematic phase, a new nematic polymorph that has been found to be both polar and ferroelectric, is the lead paragraph in an entirely new chapter in the history of liquid crystals. The potential for transformative applications utilizing this state of matter – such as photonics, non-linear optics, memory applications and so on - can only be met with significant improvements in the temperature range of existing materials such as 4-(4-nitrophenoxycarbonyl)phenyl 4-methoxy-2-methoxybenzoate (<i>RM734</i>). Herein we present several families of materials which are structurally related to the archetypal new nematic material, <i>RM734</i>, including the first non-rod-like materials within the context of the splay nematic phase. We find that the incidence (or absence) of this new nematic variant in a designer material cannot be easily rationalized in terms of molecular dipole moment or polarizability. However, mixture formulation shows promise for the engineering of materials with improved working temperature ranges. </p><b></b><p></p>

Structural Variants of RM734 in the Design of Splay Nematic Materials

<p><b>Structural Variants of <i>RM734</i> in the Design of Splay Nematic Materials</b></p><p></p><p>The recent discovery of the splay nematic phase, a new nematic polymorph that has been found to be both polar and ferroelectric, is the lead paragraph in an entirely new chapter in the history of liquid crystals. The potential for transformative applications utilizing this state of matter – such as photonics, non-linear optics, memory applications and so on - can only be met with significant improvements in the temperature range of existing materials such as 4-(4-nitrophenoxycarbonyl)phenyl 4-methoxy-2-methoxybenzoate (<i>RM734</i>). Herein we present several families of materials which are structurally related to the archetypal new nematic material, <i>RM734</i>, including the first non-rod-like materials within the context of the splay nematic phase. We find that the incidence (or absence) of this new nematic variant in a designer material cannot be easily rationalized in terms of molecular dipole moment or polarizability. However, mixture formulation shows promise for the engineering of materials with improved working temperature ranges. </p><b></b><p></p>