UV-Vis Cuvette Adaptation Device for Controlled Atmosphere Spectroscopy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current spectroscopic instruments for in-situ analysis of redox processes in organic solvents under controlled atmospheres are limited by open cells that contaminate samples and require complex modifications, leading to low yields and difficulties in titration due to exposure to air and complex geometries.
Innovation Solution
An adaptation device for UV-Vis or Raman cuvettes that seals the open end, includes removable electrodes, and features a gas inlet and outlet with shutoff valves to maintain a controlled atmosphere, allowing precise gas flow to the working electrode and solution stirring without affecting measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open cells are used for spectroscopic measurements, then the sample is exposed to air and contaminated by the environment, but the cell structure is simple and commercially available
Solution Approach 1:
A sealing device acts as an intermediary component between the open cell and the controlled atmosphere environment. This device includes a flange that seals against the cell opening and a housing that encloses the electrode assembly, creating a sealed chamber that prevents sample contamination while maintaining compatibility with standard spectroscopic equipment
Solution Approach 2:
The cell system is segmented into separate functional components: the original open cell, the sealing flange assembly, the housing containing electrodes, and the gas inlet/outlet system. This segmentation allows the sealing mechanism to be added as a modular attachment rather than redesigning the entire cell structure
2Productivity
If gas-tight cells with complex geometries are used for controlled atmosphere measurements, then the sample is protected from air, but the working electrode is disposed in the optical pathway limiting gas flow and reaction yield
Solution Approach 1:
The electrode assembly is positioned in a third dimension above the optical pathway rather than within it. The housing elevates the working electrode, counter electrode, and reference electrode above the light beam path, allowing the optical beam to pass through the sample unaffected while gas flows freely to the electrode surfaces from below
Solution Approach 2:
The gas inlet system is designed to provide dynamic gas flow to the electrode surfaces. Gas can be introduced through the housing to directly reach the working electrode, and the system allows for adjustable gas flow rates to optimize reaction yield while maintaining spectral measurement quality
3Reliability
If ex situ spectroscopic characterization is performed by collecting samples in protected atmosphere, then the sample remains protected from air, but the characterization process becomes difficult and tedious to implement
Solution Approach 1:
The sealed cell design serves multiple functions simultaneously: it maintains controlled atmosphere protection, enables in-situ spectroscopic measurements with standard equipment, provides electrochemical measurement capability, and allows gas flow control. This multi-functionality eliminates the need for separate sample transfer operations between different instrumentation
4Reliability
If standard UV-Vis cuvettes are used without adaptation, then the instrument is simple and commercially available, but the sample is exposed to air during measurement
Solution Approach 1:
A sealing flange acts as an intermediary component that attaches to the standard UV-Vis cuvette opening. This flange creates a sealed interface between the simple cuvette body and the controlled atmosphere housing, allowing standard cuvettes to be adapted for atmosphere-controlled measurements without modifying the cuvette itself
Solution Approach 2:
The sealing flange and housing assembly can be designed as a disposable or easily replaceable component that attaches to standard cuvettes. This allows researchers to use inexpensive, commercially available cuvettes while adding atmosphere control capability through a separate, replaceable sealing mechanism
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to an adaptation device (21) for adapting an UV- Vis cuvette (17) to perform in-situ spectroanalytical characterization of redox processes using gas species or solutes in a controlled atmosphere, said device being configured so as to fit the open end of a UV-Vis cuvette (17) intended to contain products to be measured during achievement of spectroanalytical measurements. The device comprises a main body (22) configured to form a lid covering the opened end (18) of the cuvette (17), said main body having a first part (23) and a second part (24); a working (13), a counter (14) and a reference (15) electrode with removable parts (132, 142, 52) at the respective ends of three conductors (131, 141, 151) coming from outside and passing through the main body (22); a gas inlet (16) intended to allow introduction of a gas said gas inlet having one aperture (162) directed to the working electrode (13) and second aperture (163) directed to the bottom of the cuvette, a gas outlet (27) intended to let the reactive gas in excess to flow out of the cuvette (17) and an solution inlet tube (28) for titration measurements.