A rare piece of evidence as to Lavoisier's state of mind at this time is provided by a letter dated 2nd February 1790 written to Benjamin Franklin. Lavoisier informs his illustrious correspondent that the Revolution has succeeded but expresses regret that popular armed intervention had been necessary. One sense a certain unease:
The state of public affairs in France during the last twelve months has temporarily retarded the progress of science and distracted scientists from the work that is most precious to them; but we must hope that tranquility and prosperity will follow the troubles through which we have passed and which are inseparable from a great revolution.
(Reproduced in Grimaux, Lavoisier p.201-2)
Franklin himself was not so sanguine. On 13th November 1789 he had written to his friend, the physicist Jean-Baptiste Leroy, in some panic over the situation in France:
Private correspondence, vol. 1, p.265.
(It is this letter which contains Franklin's memorable bon-mot that nothing can be certain "except death and taxes").
Publication of Lavoisier's correspondence is being undertaken by the Comité Lavoisier of the Academy. There are more than than 2,000 letters in total. Vol. 6, which covers the period 1789-91, appeared in 1997 and vol. 7, for 1792-94, in 2012. Both volumes were edited by Patrice Bret, who is General Secretary of the Comité Lavoisier. For details, see http://historyofscience.free.fr/Comite-Lavoisier/f_correspondance.html
Denis I. Duveen and Herbert S. Klickstein, "Benjamin Franklin (1706) and Antoine Laurent Lavoisier (1743-1794)" - 3 articles in the Annals of Science for 1955 [open-access article]