PMID- 35926216
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220816
IS  - 1520-5827 (Electronic)
IS  - 0743-7463 (Linking)
VI  - 38
IP  - 32
DP  - 2022 Aug 16
TI  - Solubilization of Aldehydes and Amines in Aqueous C(i)E(j) Surfactant Aggregates: 
      Solubilization Capacity and Aggregate Properties.
PG  - 10022-10031
LID - 10.1021/acs.langmuir.2c01463 [doi]
AB  - Hydroformylation of olefins to aldehydes and subsequent reductive amination of 
      aldehydes to amines takes place in an aqueous system using a water-soluble 
      catalyst. It is limited to short-chain molecules due to an insufficient 
      solubility of long-chain molecules in water. A promising approach to increase the 
      solubility of long-chain aldehydes and amines is the addition of surfactants to 
      the aqueous phase. In this work, we thus determined the solubilization capacity 
      (SC) of different nonionic C(i)E(j) surfactants (C(8)E(6), C(10)E(6), and 
      C(10)E(8)) toward long-chain aldehydes and amines. We used static and dynamic 
      light scattering techniques to investigate the influence of both the surfactant 
      and solute molecular structures on the SC as well as on the aggregation number 
      (N(agg)) and hydrodynamic radius (R(h)) of mixed aggregates. Our data reveals 
      that an optimum ratio of hydrophobic to hydrophilic chain length of C(i)E(j) 
      surfactants exists where the SC toward long-chain aldehydes and amines possesses 
      a maximum. Further, the size of the aggregates (N(agg), R(h)) passes through a 
      minimum upon amine solubilization, while upon aldehyde solubilization, the 
      aggregate size increases gradually. The results shown in this work give valuable 
      insights to the solubilization of aldehydes and n-amines into nonionic C(i)E(j) 
      surfactants and facilitate the search of suitable surfactants for 
      hydroformylation and reductive amination as "green" solvents based on the 
      detailed knowledge about the aggregate structure.
FAU - Kroll, Peter
AU  - Kroll P
AUID- ORCID: 0000-0001-9924-3261
AD  - Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, 
      TU Dortmund University, Emil-Figge-Strasse 70, 44227 Dortmund, Germany.
FAU - Sadowski, Gabriele
AU  - Sadowski G
AUID- ORCID: 0000-0002-5038-9152
AD  - Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, 
      TU Dortmund University, Emil-Figge-Strasse 70, 44227 Dortmund, Germany.
FAU - Brandenbusch, Christoph
AU  - Brandenbusch C
AUID- ORCID: 0000-0003-3338-9211
AD  - Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, 
      TU Dortmund University, Emil-Figge-Strasse 70, 44227 Dortmund, Germany.
LA  - eng
PT  - Journal Article
DEP - 20220804
PL  - United States
TA  - Langmuir
JT  - Langmuir : the ACS journal of surfaces and colloids
JID - 9882736
SB  - IM
EDAT- 2022/08/05 06:00
MHDA- 2022/08/05 06:01
CRDT- 2022/08/04 17:12
PHST- 2022/08/05 06:00 [pubmed]
PHST- 2022/08/05 06:01 [medline]
PHST- 2022/08/04 17:12 [entrez]
AID - 10.1021/acs.langmuir.2c01463 [doi]
PST - ppublish
SO  - Langmuir. 2022 Aug 16;38(32):10022-10031. doi: 10.1021/acs.langmuir.2c01463. Epub 
      2022 Aug 4.