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Chapter 3 49<br />
were investigated as well. Remarkably, by introducing [BPh4] - to the Ru-SBUs, MOF<br />
materials that do not include BPh4 were successfully obtained. Interestingly, the amount<br />
of residual included guest molecules G in the modified MOFs (3_ex and 4_ex) decreases<br />
compared to respective Ru-MOFs obtained starting from [Ru2(OOCR)4Cl]. In particular,<br />
sample 4_ex which contains the lowest amount of the guest molecules (acetic acid), is the<br />
first material obtained in the series of Ru-analogs of [Cu3(BTC)2]n that includes no strongly<br />
coordinating counter-ions X originating from the used Ru-SBUs.<br />
Solvent exchange procedure was introduced to achieve better removal of the guest<br />
molecules without damaging the framework integrity after activation. As expected, after<br />
applying such improved activation procedure, the counter-ions [BPh4] - and most of the<br />
guest and solvent molecules (like acetic acid) were washed out of the material while the<br />
crystallinity and thermal stability are retained. These studies are particularly crucial for<br />
the future investigation and elaboration of these materials for targeted applications, such<br />
as in selective sorption and catalysis. In summary, the synthesis of the Ru-MOF is still<br />
difficult to optimize further. Nevertheless, the investigations herein afford better<br />
understanding and directions towards not only HKUST-1 analogs but also other MOFs<br />
with PW SBU.
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