Phosphorous boron-bonded compounds for capturing, storing and/or utilizing carbon dioxide and related products compositions methods and systems

A method for capturing carbon dioxide from a target environment, the method comprising:

• contacting the target environment with at least one phosphorous boron-bonded compound
• the contacting performed for a time and under condition to allow binding of CO2 if present with the at least one phosphorous boron-bonded compound to form a phosphino-borane-carbon dioxide complex
• wherein the at least one phosphorous boron-bonded compound comprises one or more of
• (i) a phosphine-borane of Formula I
• in which R1, R2, R3, R4 and R5 are each independently H, F or a substituted or unsubstituted alkyl, aryl, alkoxy, aryloxy or dialkylamino group, or group of Formula II
• in which R′1, R′2, R′3, and R′4 are independently a substituted or unsubstituted alkyl or aryl group, and
• in which R1, R2, R3, R4 and R5 are configured to provide a P—H bond having pKa 5≤pKa≤25 at 298K, at 1 atm
• (ii) a cyclic phosphine-borane of Formula III
• in which
• n is 0 or 1
• R1, R3, and R4 are each independently H, F or a substituted or unsubstituted alkyl, aryl, alkoxy, aryloxy or dialkylamino group, or group of Formula II
• in which R′1, R′2, R′3, and R′4 are independently a substituted or unsubstituted alkyl or aryl group
• R6 is H or is joined to R7 to form a substituted or unsubstituted and optionally heteroatom containing aliphatic or aromatic 5 membered or 6-membered ring
• R7 is H or is joined to R6 or R8 to form a substituted or unsubstituted and optionally heteroatom containing aliphatic or aromatic 5 membered or 6-membered ring
• R8 is H or is joined to R7 or R9 to form a substituted or unsubstituted and optionally heteroatom containing aliphatic or aromatic 5 membered or 6-membered ring and
• R9 is H or is joined to R8 to form a substituted or unsubstituted and optionally heteroatom containing aliphatic or aromatic 5 membered or 6-membered ring
• and
• (iii) a phosphine-borane salt of Formula IV
• in which n is an integer from 1 to 3
• R1, R2, R3, R4 and R5 are each independently H, F or a substituted or unsubstituted alkyl, aryl, alkoxy, aryloxy or dialkylamino group, or group of Formula II
• in which R′1, R′2, R′3, and R′4 are independently a substituted or unsubstituted alkyl or aryl group,
• M is Li, Na, K, Rb, Cs or tetraalkylammonium when n=1;
• Mg, Ca, Sr, Ba when n=2 or Al when n=3
• and in which R1, R2, R3, R4 and R5 are in configured such that the phosphino-borane exhibits a reactivity toward CO2 with a ΔG value <0 kcal/mol at 298K, at 1 atm,
• wherein the phosphino-borane-carbon dioxide complex is a complex of Formula V
• in which
• n is an integer from 1 to 3
• R1, R2, R3, R4 and R5 are each independently H, F or a substituted or unsubstituted alkyl, aryl, alkoxy, aryloxy or dialkylamino group, or group of Formula II
• in which R′1, R′2, R′3, and R′4 are independently a substituted or unsubstituted alkyl or aryl group, and
• M is Li, Na, K, Rb, Cs or tetraalkylammonium when n=1;
• Mg, Ca, Sr, Ba when n=2 or Al when n=3,
• and wherein when the at least one phosphorous boron-bonded compound comprises a phosphino-borane of Formula (I) and/or a cyclic phosphino-borane of Formula (III), the contacting is performed in presence of a base.