Order-disorder transitions in self-assembled monolayers: A 13C solid-state NMR study

Wei Gao; Lucy Dickinson; Christina Grozinger; Frederick G. Morin; Linda Reven

doi:10.1021/la960808q

Order-disorder transitions in self-assembled monolayers: A ¹³C solid-state NMR study

Wei Gao, Lucy Dickinson, Christina Grozinger, Frederick G. Morin, Linda Reven

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91 Scopus citations

Abstract

The effect of the chain length and temperature on ordering of alkylphosphonate, (C_nH_2n+1)PO₃H₂, n = 8-18, monolayers on ZrO₂ was characterized by solid-state ¹³C NMR. Alkylphosphonate monolayers with chain lengths of n < 16 are disordered at room temperature. C₁₈ monolayers of thiols and phosphonates both show reversible chain melting at ∼50 °C. This chain length dependence, as well as variable-temperature spectra, demonstrates that the thermal stabilities of conformational order in phosphonate and thiol monolayers are similar. In general, the initial free volume in a self-assembled monolayer on a rough surface is large enough to allow reversible thermal disordering although the headgroup remains rigid.

Original language	English (US)
Pages (from-to)	115-118
Number of pages	4
Journal	Langmuir
Volume	13
Issue number	2
DOIs	https://doi.org/10.1021/la960808q
State	Published - Jan 22 1997

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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title = "Order-disorder transitions in self-assembled monolayers: A 13C solid-state NMR study",

abstract = "The effect of the chain length and temperature on ordering of alkylphosphonate, (CnH2n+1)PO3H2, n = 8-18, monolayers on ZrO2 was characterized by solid-state 13C NMR. Alkylphosphonate monolayers with chain lengths of n < 16 are disordered at room temperature. C18 monolayers of thiols and phosphonates both show reversible chain melting at ∼50 °C. This chain length dependence, as well as variable-temperature spectra, demonstrates that the thermal stabilities of conformational order in phosphonate and thiol monolayers are similar. In general, the initial free volume in a self-assembled monolayer on a rough surface is large enough to allow reversible thermal disordering although the headgroup remains rigid.",

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TY - JOUR

T1 - Order-disorder transitions in self-assembled monolayers

T2 - A 13C solid-state NMR study

AU - Gao, Wei

AU - Dickinson, Lucy

AU - Grozinger, Christina

AU - Morin, Frederick G.

AU - Reven, Linda

PY - 1997/1/22

Y1 - 1997/1/22

N2 - The effect of the chain length and temperature on ordering of alkylphosphonate, (CnH2n+1)PO3H2, n = 8-18, monolayers on ZrO2 was characterized by solid-state 13C NMR. Alkylphosphonate monolayers with chain lengths of n < 16 are disordered at room temperature. C18 monolayers of thiols and phosphonates both show reversible chain melting at ∼50 °C. This chain length dependence, as well as variable-temperature spectra, demonstrates that the thermal stabilities of conformational order in phosphonate and thiol monolayers are similar. In general, the initial free volume in a self-assembled monolayer on a rough surface is large enough to allow reversible thermal disordering although the headgroup remains rigid.

AB - The effect of the chain length and temperature on ordering of alkylphosphonate, (CnH2n+1)PO3H2, n = 8-18, monolayers on ZrO2 was characterized by solid-state 13C NMR. Alkylphosphonate monolayers with chain lengths of n < 16 are disordered at room temperature. C18 monolayers of thiols and phosphonates both show reversible chain melting at ∼50 °C. This chain length dependence, as well as variable-temperature spectra, demonstrates that the thermal stabilities of conformational order in phosphonate and thiol monolayers are similar. In general, the initial free volume in a self-assembled monolayer on a rough surface is large enough to allow reversible thermal disordering although the headgroup remains rigid.

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Order-disorder transitions in self-assembled monolayers: A ¹³C solid-state NMR study

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