Search Results - "Helder, M."

The inorganic chemistry of the cobalt corrinoids – an update by Marques, Helder M.

“…The inorganic chemistry of the cobalt corrinoids, derivatives of vitamin B12, is reviewed, with particular emphasis on equilibrium constants for, and kinetics…”
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Electron transfer in biological systems by Marques, Helder M

“…Examples of how metalloproteins feature in electron transfer processes in biological systems are reviewed. Attention is focused on the electron transport…”
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Corrins and porphyrins: two of nature's pigments of life by Marques, Helder M.

“…Given the relative scarcity of cobalt in the earth's crust, its retention in biological systems, principally (but not exclusively) in the cobalt corrinoids or…”
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Significance of hydrogen bonding and other noncovalent interactions in determining octahedral tilting in the CH3NH3PbI3 hybrid organic-inorganic halide perovskite solar cell semiconductor by Varadwaj, Pradeep R., Varadwaj, Arpita, Marques, Helder M., Yamashita, Koichi

“…The CH 3 NH 3 PbI 3 (methylammonium lead triiodide) perovskite semiconductor system has been viewed as a blockbuster research material during the last five…”
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Is the Fluorine in Molecules Dispersive? Is Molecular Electrostatic Potential a Valid Property to Explore Fluorine-Centered Non-Covalent Interactions? by Varadwaj, Arpita, Marques, Helder M, Varadwaj, Pradeep R

“…Can two sites of positive electrostatic potential localized on the outer surfaces of two halogen atoms (and especially fluorine) in different molecular domains…”
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The Phosphorus Bond, or the Phosphorus-Centered Pnictogen Bond: The Covalently Bound Phosphorus Atom in Molecular Entities and Crystals as a Pnictogen Bond Donor by Varadwaj, Pradeep R, Varadwaj, Arpita, Marques, Helder M, Yamashita, Koichi

“…The phosphorus bond in chemical systems, which is an inter- or intramolecular noncovalent interaction, occurs when there is evidence of a net attractive…”
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Spatial eigenfunction analyses in stream networks: do watercourse and overland distances produce different results by LANDEIRO, VICTOR L, MAGNUSSON, WILLIAM E, MELO, ADRIANO S, ESPÍRITO-SANTO, HELDER M.V, BINI, LUIS M

“…1. The use of spatial variables is a common procedure in ecological studies. The technique is based on the definition of a connectivity/distance matrix that…”
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Halogen Bonding: A Halogen-Centered Noncovalent Interaction Yet to Be Understood by Varadwaj, Pradeep, Varadwaj, Arpita, Marques, Helder

“…In addition to the underlying basic concepts and early recognition of halogen bonding, this paper reviews the conflicting views that consistently appear in the…”
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The Pnictogen Bond: The Covalently Bound Arsenic Atom in Molecular Entities in Crystals as a Pnictogen Bond Donor by Varadwaj, Arpita, Varadwaj, Pradeep R, Marques, Helder M, Yamashita, Koichi

“…In chemical systems, the arsenic-centered pnictogen bond, or simply the arsenic bond, occurs when there is evidence of a net attractive interaction between the…”
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The Pnictogen Bond, Together with Other Non-Covalent Interactions, in the Rational Design of One-, Two- and Three-Dimensional Organic-Inorganic Hybrid Metal Halide Perovskite Semiconducting Materials, and Beyond by Varadwaj, Arpita, Varadwaj, Pradeep R, Marques, Helder M, Yamashita, Koichi

“…The pnictogen bond, a somewhat overlooked supramolecular chemical synthon known since the middle of the last century, is one of the promising types of…”
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The Stibium Bond or the Antimony-Centered Pnictogen Bond: The Covalently Bound Antimony Atom in Molecular Entities in Crystal Lattices as a Pnictogen Bond Donor by Varadwaj, Arpita, Varadwaj, Pradeep R, Marques, Helder M, Yamashita, Koichi

“…A stibium bond, i.e., a non-covalent interaction formed by covalently or coordinately bound antimony, occurs in chemical systems when there is evidence of a…”
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Chalcogen Bonding in the Molecular Dimers of WCh2 (Ch = S, Se, Te): On the Basic Understanding of the Local Interfacial and Interlayer Bonding Environment in 2D Layered Tungsten Dichalcogenides by Varadwaj, Pradeep R., Varadwaj, Arpita, Marques, Helder M., Yamashita, Koichi

“…Layered two-dimensional transition metal dichalcogenides and their heterostructures are of current interest, owing to the diversity of their applications in…”
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The Tetrel Bond and Tetrel Halide Perovskite Semiconductors by Varadwaj, Pradeep R, Varadwaj, Arpita, Marques, Helder M, Yamashita, Koichi

“…The ion pairs [Cs •TtX ] (Tt = Pb, Sn, Ge; X = I, Br, Cl) are the building blocks of all-inorganic cesium tetrel halide perovskites in 3D, CsTtX , that are…”
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Methylammonium Tetrel Halide Perovskite Ion Pairs and Their Dimers: The Interplay between the Hydrogen-, Pnictogen- and Tetrel-Bonding Interactions by Varadwaj, Pradeep R, Varadwaj, Arpita, Marques, Helder M, Yamashita, Koichi

“…The structural stability of the extensively studied organic-inorganic hybrid methylammonium tetrel halide perovskite semiconductors, MATtX (MA = CH NH ; Tt =…”
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Reproductive strategies of Amazonian stream fishes and their fine-scale use of habitat are ordered along a hydrological gradient by Espírito-Santo, Helder M. V., Rodríguez, Marco A., Zuanon, Jansen

“…Summary Macroecological comparisons have shown that habitat characteristics have a major influence on the evolution of life‐history strategies of fishes in…”
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Nature of halogen‐centered intermolecular interactions in crystal growth and design: Fluorine‐centered interactions in dimers in crystalline hexafluoropropylene as a prototype by Varadwaj, Arpita, Marques, Helder M., Varadwaj, Pradeep R.

“…The wide occurrence of halogen‐centered noncovalent interactions in crystal growth and design prompted this study, which includes a mini review of recent…”
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The Cs2AgRhCl6 Halide Double Perovskite: A Dynamically Stable Lead-Free Transition-Metal Driven Semiconducting Material for Optoelectronics by Varadwaj, Pradeep R., Marques, Helder M.

“…A -Site doping with alkali ions, and/or metal substitution at the B and B′-sites, are among the key strategies in the innovative development of A 2 BB′X 6…”
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Definition of the Pnictogen Bond: A Perspective by Varadwaj, Arpita, Varadwaj, Pradeep R., Marques, Helder M., Yamashita, Koichi

“…This article proposes a definition for the term “pnictogen bond” and lists its donors, acceptors, and characteristic features. These may be invoked to identify…”
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Revealing Factors Influencing the Fluorine‐Centered Non‐Covalent Interactions in Some Fluorine‐Substituted Molecular Complexes: Insights from First‐Principles Studies by Varadwaj, Arpita, Varadwaj, Pradeep R., Marques, Helder M., Yamashita, Koichi

“…We examine the equilibrium structure and properties of six fully or partially fluorinated hydrocarbons and several of their binary complexes using…”
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More than meets the eye: syntopic and morphologically similar mangrove killifish species show different mating systems and patterns of genetic structure along the Brazilian coast by Berbel-Filho, Waldir M, Tatarenkov, Andrey, Espírito-Santo, Helder M V, Lira, Mateus G, Garcia de Leaniz, Carlos, Lima, Sergio M Q, Consuegra, Sofia

“…Different mating systems can strongly affect the extent of genetic diversity and population structure among species. Given the increased effects of genetic…”
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