Pressure-induced electron transfer in quasi-molecular solids

HC Hsueh; WCK Poon; H Vass; J Crain

Pressure-induced electron transfer in quasi-molecular solids

HC Hsueh^*, WCK Poon, H Vass, J Crain

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A combination of Raman scattering and synchrotron X-ray powder diffraction on Group-V metal triiodides (XI(3), X = As, Sb, Bi) has revealed a continuous isostructural transition from a molecular solid to a two-dimensional layered crystal under high pressure. The loss of molecular identity proceeds by gradual pressure-induced electron transfer from intramolecular to intermolecular bonds and suppression of sp(3) hybridisation. Initial pressure increase has the effect of destroying molecular units while continued compression enhances intralayer cohesion. These two effects give rise to a non-monotonic pressure variation of the X-I bond-stretching frequency.

Original language	English
Pages (from-to)	689-694
Number of pages	6
Journal	European Physical Society Letters (EPL)
Volume	35
Issue number	9
Publication status	Published - 20 Sept 1996

Keywords / Materials (for Non-textual outputs)

DIAMOND-ANVIL CELL
POWDER DIFFRACTION

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title = "Pressure-induced electron transfer in quasi-molecular solids",

abstract = "A combination of Raman scattering and synchrotron X-ray powder diffraction on Group-V metal triiodides (XI(3), X = As, Sb, Bi) has revealed a continuous isostructural transition from a molecular solid to a two-dimensional layered crystal under high pressure. The loss of molecular identity proceeds by gradual pressure-induced electron transfer from intramolecular to intermolecular bonds and suppression of sp(3) hybridisation. Initial pressure increase has the effect of destroying molecular units while continued compression enhances intralayer cohesion. These two effects give rise to a non-monotonic pressure variation of the X-I bond-stretching frequency.",

keywords = "DIAMOND-ANVIL CELL, POWDER DIFFRACTION",

author = "HC Hsueh and WCK Poon and H Vass and J Crain",

year = "1996",

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language = "English",

volume = "35",

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T1 - Pressure-induced electron transfer in quasi-molecular solids

AU - Hsueh, HC

AU - Poon, WCK

AU - Vass, H

AU - Crain, J

PY - 1996/9/20

Y1 - 1996/9/20

N2 - A combination of Raman scattering and synchrotron X-ray powder diffraction on Group-V metal triiodides (XI(3), X = As, Sb, Bi) has revealed a continuous isostructural transition from a molecular solid to a two-dimensional layered crystal under high pressure. The loss of molecular identity proceeds by gradual pressure-induced electron transfer from intramolecular to intermolecular bonds and suppression of sp(3) hybridisation. Initial pressure increase has the effect of destroying molecular units while continued compression enhances intralayer cohesion. These two effects give rise to a non-monotonic pressure variation of the X-I bond-stretching frequency.

AB - A combination of Raman scattering and synchrotron X-ray powder diffraction on Group-V metal triiodides (XI(3), X = As, Sb, Bi) has revealed a continuous isostructural transition from a molecular solid to a two-dimensional layered crystal under high pressure. The loss of molecular identity proceeds by gradual pressure-induced electron transfer from intramolecular to intermolecular bonds and suppression of sp(3) hybridisation. Initial pressure increase has the effect of destroying molecular units while continued compression enhances intralayer cohesion. These two effects give rise to a non-monotonic pressure variation of the X-I bond-stretching frequency.

KW - DIAMOND-ANVIL CELL

KW - POWDER DIFFRACTION

M3 - Article

SN - 0295-5075

VL - 35

SP - 689

EP - 694

JO - European Physical Society Letters (EPL)

JF - European Physical Society Letters (EPL)

IS - 9

ER -

Pressure-induced electron transfer in quasi-molecular solids

Abstract

Keywords / Materials (for Non-textual outputs)

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