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Chapter 5 143
5.5 Catalytic test reaction
Both Pd 2+ -containing MOF ([Pd(2-pymo)2]n, 2-pymo = 2-pyrimidinolate) [276-277, 293] and
Pd 0 @MOF [272-273, 281-282] have been reported as good reusable catalysts in typical
palladium-catalyzed reactions such as Suzuki C–C couplings and hydrogenation. Owing to
both Pd 0 NPs and potential Pd 2+ -CUS (that should be available after thermal treatment
and specifically promote H2 splitting) in obtained Pd-doped Cu/Pd-BTC materials, it was
of interest to test their catalytic activity.
Figure 5.22. Concentration of PNP as a function of time for non-doped Cu-BTC and Pd containing
Cu/Pd-BTC_1-4 as catalysts in the aqueous-phase hydrogenation of PNP with NaBH 4 to PAP. The
insert shows the initial reaction rate for Cu/Pd-BTC_1-4 normalized to the amount of Pd in the
catalyst, respectively. Reaction conditions: c PNP = 0.18 mmol dm −3 , c NaBH4 = 0.60 mmol dm −3 , T =
298 K, stirring speed = 1300 min −1 , m catalyst = 5.0 mg, ambient pressure. Figure is provided by Z.
Chen.
As a test reaction, the aqueous-phase hydrogenation of PNP to PAP using NaBH4 as a
reducing agent has been chosen. It can be conducted at room temperature and ambient
pressure within reaction times < 10 min using a simple on-line UV-Vis spectroscopy to
monitor the progress of the reaction. [281, 294-295] The concentration of PNP as a function of