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The GreenHouse Plus™ Parallel Synthesiser exists for parallel chemical synthesis and reaction screening, enabling 24 simultaneous heated and stirred reactions with volumes from 0.5 mL to 7 mL. The system combines heating, stirring, refluxing, and inert atmosphere capability in a compact format compatible with standard microtitre plate (MTP) workflows.
The removable reaction block holds 24 glass reaction tubes and mirrors the footprint of a standard MTP, allowing straightforward sample transfer using multi-channel pipettors or robotic systems. The compact design supports high-throughput experimentation while minimizing bench space requirements.
Key Features
- 24 heated and stirred reaction positions
- Reaction volumes from 0.5 mL to 7 mL
- Heating up to 150 °C
- Operation under inert atmosphere
- Water-cooled reflux head with nickel condensing fingers
- Compact MTP-compatible footprint
- Chemical-resistant nickel-plated aluminium construction
- Easy visibility of all reaction tubes during operation
Heating and temperature control
The GreenHouse Plus™ is heated directly using a Carousel Stirring Hotplate and can simultaneously heat all 24 reactions from ambient temperature to 150 °C with an accuracy of ±0.5 °C.
Temperature control options include:
- Integral digital hotplate control
- Optional Pt1000 temperature sensor for enhanced accuracy
The Pt1000 sensor is inserted through the lid and septa directly into the aluminium base for accurate temperature monitoring.
The round aluminium base distributes heat evenly across all reaction positions to support reproducible reaction conditions.
Stirring performance
The system uses Radleys’ V-Mag technology to improve stirring uniformity in each reaction tube. A vertically positioned PTFE stir bar is driven by the secondary magnetic field generated by the Carousel Stirring Hotplate.
Benefits of the stirring system include:
- Powerful and even mixing across all 24 positions
- Improved stirring uniformity within individual tubes
- Simultaneous stirring using a single magnetic drive system
Efficient refluxing
The water-cooled reflux/inerting head provides efficient refluxing within each glass reaction tube while minimizing solvent evaporation.
Key reflux features include:
- Nickel condensing fingers inserted directly into each tube
- Water circulation creating a cooling zone for vapor condensation
- Reduced solvent loss during reactions
- Nickel construction for resistance to aggressive vapors
- Quick-release water couplings with shut-off valves to reduce leaks
The combination of reflux and additions head also allows reagents to be added or removed during reflux operation/
Operation under inert atmosphere
The GreenHouse Plus™ supports reactions under inert conditions using a sealed gas enclosure with a single inlet/outlet for vacuum and inert gas.
Additional inerting features include:
- Minimal gas flow through the chamber to reduce solvent evaporation
- Nickel-plated safety relief valve to prevent over-pressure
- Replaceable septum mats for reagent addition or sampling during reflux or inert operation
The cylindrical glass enclosure forms a gas-tight chamber while maintaining full visibility of all reaction tubes.
Compact design
The lightweight design allows the system to be easily lifted on or off the stirrer and rotated for convenient access to all reaction positions. The compact footprint helps save space in fume cupboards and simplifies storage after use.
Additional design benefits include:
- Full visibility of all 24 reaction tubes
- Easy-to-clean contoured exterior
- Maintenance-free operation with no electrical or moving parts
- Simple setup and operation for routine laboratory use
