Crystal growth and hydration effects in morpholinium 4-hydroxybenzoate (M4HB)

The growth of a large single crystal of the new non-linear optical salt morpholinium 4-hydroxybenzoate (M4HB) is reported. Growth of crystals from dry ethanol, or 2-propanol, yields the non-centrosymmetric form belonging to space group Cc (No. 9). This is the desirable structure since it exhibits se...

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Bibliographic Details
Published in:	Journal of crystal growth Vol. 225; no. 2-4; pp. 474 - 478
Main Authors:	Bahra, Gurmit S., Chaloner, Penny A., Dutta, Lucy M., Healy, W., Hitchcock, Peter B.
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Amsterdam Elsevier B.V 01-05-2001 Elsevier
Subjects:	A2. Single crystal growth B1. Organic compounds B1. Salts B3. Nonlinear optical devices Cross-disciplinary physics: materials science; rheology Exact sciences and technology Fundamental areas of phenomenology (including applications) Growth from solutions Materials science Methods of crystal growth; physics of crystal growth Nonlinear optical crystals Optical materials Optics Physics B1.Salts A2.Single crystal growth 42.65.Ky 42.70.Mp B1.Organic compounds 81.10.Dn B3.Nonlinear optical devices Second harmonic generation Organic cation Hydration Organic solvents Solubility Experimental study Characterization Organic anion Monocrystals Saturated solution Optical properties Six membered ring Phenols Crystal growth from solutions Optical materials Nonlinear optics Carboxylates Organic compounds Solvent effects Oxygen nitrogen heterocycle Crystal structure
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Summary:	The growth of a large single crystal of the new non-linear optical salt morpholinium 4-hydroxybenzoate (M4HB) is reported. Growth of crystals from dry ethanol, or 2-propanol, yields the non-centrosymmetric form belonging to space group Cc (No. 9). This is the desirable structure since it exhibits second harmonic generation (SHG). Attempts to improve solubility by using a water:ethanol co-solvent result in the total loss of SHG activity due to the formation of morpholinium 4-hydroxybenzoate dihydrate in the centrosymmetric space group P21/c(No. 14).
ISSN:	0022-0248 1873-5002
DOI:	10.1016/S0022-0248(01)00937-X