Study on the volatility of halogenated fluorenes

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Oliveira, JASA (Author) Other; Oliveira, TSM (Author) Other; Gaspar, A (Author) Other; Fernanda Borges (Author) FCUP; Maria D M C R Ribeiro da Silva (Author) FCUP; Manuel J S Monte (Author) FCUP

Journal

Title: Chemosphere

Vol. 157

Pages: 25-32

ISSN: 0045-6535

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 7 Citations

Other information

Authenticus ID: P-00K-GJD

DOI: 10.1016/j.chemosphere.2016.05.014

Abstract (EN): This work reports the experimental determination of relevant thermophysical properties of five halogenated fluorenes. The vapor pressures of the compounds studied were measured at different temperatures using two different experimental techniques. The static method was used for studying 2-fluorofluorene (liquid and crystal vapor pressures between 321.04 K and 411.88 K), 2-iodofluorene (liquid and crystal vapor pressures between 362.63 K and 413.86 K), and 2,7-dichlorofluorene (crystal vapor pressures between 364.64 K and 394.22 K). The Knudsen effusion method was employed to determine the vapor pressures of 2,7-difluorofluorene (crystal vapor pressures between 299.17 K and 321.19 K), 2,7-diiodofluorene (crystal vapor pressures between 393.19 K and 415.14 K), and (again) 2-iodofluorene (crystal vapor pressures between 341.16 K and 361.12 K). The temperatures and the molar enthalpies of fusion of the five compounds were determined using differential scanning calorimetry. The application to halogenated fluorenes of recently developed methods for predicting vapor pressures and enthalpies of sublimation and vaporization of substituted benzenes is also discussed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8